状语从句专项练习经典
英语状语从句题20套(带答案)含解析
英语状语从句题20套(带答案)含解析一、初中英语状语从句1．You will be late for school________ you don’t get up early.A．but B．if C．and D．or【答案】B【解析】【详解】句意：如果你不早起，你将会上学迟到。
be late for school上学迟到；get up起床。
but表示前后是转折关系；and表示前后并列或递进关系。
由此知前后句构成“结果＋条件”的关系，即“如果你不早起，你将会迟到。
”。
故选B。
2．—The novel seems a little boring.—You won’t enjoy it _______________ you put your heart into it.A．when B．if C．after D．unless【答案】D【解析】试题分析：句意：--这部小说似乎有点儿无聊。
--如果你不用心读的话，你不会享受到这本书。
when，当……的时候；if如果；after在……之后；unless，如果不，除非。
结合句意，故选D。
考点：考查连词的用法。
3．We will go to Tian’anmen Square to watch the raising of national flag if it _________ tomorrow.A．will rain B．rainsC．doesn’t rain D．won’t rain【答案】C【解析】试题分析：句意：如果明天不下雨我们要去天安门广场看升国旗。
根据句意及题干分析if 引导的是条件状语从句，主句是一般将来时态，根据“主将从现”原则，if从句中应用一般现在时态，根据句意是“不下雨”，所以选C。
【考点定位】考查动词的时态。
4．—Have you heard of the latest news about WIFI?—Yes. When the 5G age , the Internet speed will be 100 times as high as 4G.A．come B．comes C．will come D．is coming【答案】B【解析】【详解】句意：——你听说过无线网络的最新消息吗？——是的。
(完整版)英语状语从句专题(练习题含答案)
一、选择题1．In ancient times, people seldom travelled long distances and most farmers only travelled ________ the local market.A．longer than B．more than C．as much as D．as far as 2．Don't be afraid of asking for help ________ it is needed.A．unless B．until C．although D．when3．You will be out of date ________ you keep on studying from time to time.A．unless B．although C．if D．otherwise 4．—My parents gave red packets to my sister every Spring Festival ________ she got a job. —That’s because your sister was able to make money by that time.A．after B．when C．since D．until5．My grandma enjoys sharing videos on Douyin like the young ________ she is over seventy. A．since B．if C．though D．unless 6．Sam thought his robot broken ________ Jim pointed out that he’d forgotte n to turn it off. A．until B．unless C．after D．as soon as 7．—Do you like the Chinese cartoon Boonie Bears: Blast into the Past?—Sure. It is ________ interesting film ________ my son wants to see it again.A．so; that B．such a; that C．so an; that D．such an; that 8．— Jenny, will you leave for the UK now?— No. It will be two weeks ________ I leave here.A．until B．since C．before D．when9．—It is a pity that the disease is still terrible at present.—Yes. It will be worse ________ we take further action to do something for it.A．unless B．since C．if D．when 10．You’ll ________ the war ________ you watch the film.A．feel sad about; unless B．feel sad about; ifC．feel sad with; unless D．feel sad with; if11．—When will the railway that connects the two cities open?— next year. Only two thirds been built.A．Until; has B．Until; haveC．Not until; has D．Not until; have12．At present,it is not easy for some students to get up early ________ they have too much homework to finish.A．unless B．since C．as a result D．although 13．—The novel written by Stephen seems a bit boring to me.—___________ you put your heart into it, you won't enjoy it.A．When B．If C．After D．Unless 14．The astronaut lives in ________ that he has to be careful with every movement.A．such little space B．so little space C．so much space D．such more space 15．All students should keep taking exercise every day _______ they are busy studying so many subjects.A．until B．because C．though D．unless16．The old couple insist on living in a small village among the mountains __________ they can get closer to nature.A．until B．unless C．even though D．so that17．— Do you often take exercise in the morning every day?— Yes. I go jogging every morning_______there is heavy air pollution.A．until B．unless C．if D．as18．The kitchen in my flat is well designed it is a bit small.A．although B．since C．so D．because 19．—_______ Dr. Zhong Nanshan knew that COVID-19 was a deadly new virus, he still went to Wuhan in Central China to help the local people.—He is really a brave and kind doctor.A．If B．As soon as C．Because D．Although 20．It’s almost three years ________we saw each other last time.A．since B．after C．when D．before21．you are very busy, I won’t go to Xuzhou Amusement Land with you.A．Unless B．Whether C．Until D．Since22．It’s sad to hear that 19 people lost their lives ________ they were fighting with the forest fire in Liangshan, Sichuan.A．as soon as B．after C．while D．until23．You will get a toothache _____________ you clean your teeth regularly.A．unless B．when C．though D．because 24．Plenty of ideas were considered________the artist decided on the design of the sculpture. A．before B．so C．unless D．because 25．There will be fewer accidents _______ all of us obey the traffic rule.A．if B．unless C．though D．because26．________ it has a long history, time hasn’t stopped the Forbidden City from trying to build bridges with young people through cultural products.A．Unless B．Because C．Although D．Since27．Jack is still working to high standards ________ he has made great achievements. A．until B．if C．though D．because28．________ she couldn’t see his face, she could tell by his voice that he was young. A．Unless B．If C．Though D．Because 29．—Look! Someone is running the red lights.—We should wait ________ others are breaking the rules.A．although B．because C．unless D．if30．Jack has made great progress ________ he joined the English club.A．when B．since C．while D．before31．—We will go out for a picnic as we planned ________ it rains tomorrow.—You needn’t worry about the weather. It’s sunny tomorrow.A．until B．unless C．if D．when 32．Everyone makes mistakes, and no one will make progress ________ he is willing to learn from them.A．unless B．if C．though D．but33．— Why did your mother get ________ with you just now?—Because I made ________ many mistakes in the exam that she ________ controlled her feelings when she heard it.A．satisfied; so; really B．satisfied; such; nearlyC．angry; so; hardly D．angry; such; mainly34．—Too much homework has made me tired these days, Miss Wang.—Tha t’s true. But a small tree won’t grow into a big tree ________ it experiences lots of winds and rains.A．if B．while C．when D．unless35．—Did you watch the Football League yesterday?—Yes, of course. I never miss it ________ I am too busy with my homework.A．unless B．until C．if D．since36．Life is like climbing a mountain. ________ you feel tired, you will enjoy the beautiful view at the top of the mountain.A．Since B．Unless C．Because D．Though37．— Has the meeting begun?—Not yet. We have to wait ________ everyone is here.A．and B．until C．or D．but38．_______ she is wrong, it’s not a big deal.A．Because B．So C．Although D．But39．The pollution in the sea will be terrible ________ the Japanese government gives up their plan.A．until B．unless C．because D．if 40．Protecting wildlife is without doubt an important part, ________ each animal on Earth has a role to play in the ecosystem.A．since B．though C．unless D．if41．________ Jane couldn’t see his face, she could tell by his voice that he was a middle-aged man.A．Unless B．Although C．If D．Until 42．Suzy, you will achieve nothing ________ you devote yourself to your study.A．after B．though C．because D．unless43．Her job is not up to the boss's standard ________ she has worked at it for a week. A．since B．although C．if D．unless44．Your parents love you so much ________ they seldom say, “I love you”.A．unless B．that C．because D．although 45．You will never grow ________ you try to do something beyond your abilities.A．when B．since C．though D．unless 46．—What is our head teacher like?—Oh, he is very kind ________ he looks very serious.A．because B．though C．if D．when47．________ I have solved it, you can't imagine how much difficulty I faced.A．Because B．Although C．Unless D．When48．Mr. Picky won’t want to eat it ________ he’s really hungry, in which case he’ll eat almost anything.A．because B．when C．before D．unless49．The theatre will have to close ________ the government agrees to give extra money.A．if B．unless C．because D．until 50．Grade 9 students should keep exercising ________ they are busy with so many subjects. A．if B．until C．though D．because【参考答案】***试卷处理标记，请不要删除一、选择题1．D【详解】句意：在古代，人们很少长途旅行，大多数农民最远的行程仅仅是到当地的市场。
高中英语语法 状语从句专项练习题 50题。(有答案)
高中英语语法状语从句专项练习题 50题。
(有答案)1.We need to hurry because it is getting dark.2.I couldn't do it until you explained how.3.Unless he comes。
we won't be able to go.4.I XXX I XXX class.5.Every time I catch a cold。
I have pain in my back.6.XXX?7.Bring it nearer so that I may see it better.8.You may arrive in Beijing early if you don't mind taking the night train.9.XXX XXX.10.More people will eat out in restaurants than they do today.19.The house stood where there had been a rock.20.Small as it is。
the pen is a most XXX.21.After the new technique was introduced。
XXX in 1988 as the year before.22.The piano in the other shop will be cheaper。
but not as good.23.John plays football as well as。
if not better than。
David.24.When you read the book。
you'd better make a mark where you have any ns.25.As the day went on。
状语从句专项练习50题
状语从句专项练习50题1. I was doing my homework ______ my mother was cooking dinner.A. whileB. whenC. asD. until答案：A。
本题考查时间状语从句连接词的用法。
“while”强调两个动作同时进行，“我在做作业”和“我妈妈在做晚饭”两个动作同时发生，所以用“while”。
“when”既可表示同时，也可表示先后，在此语境不如“while”贴切。
“as”表示“随着”，不符合句意。
“until”表示“直到”，与句意不符。
2. ______ I was walking in the park, I saw a beautiful bird.A. WhileB. WhenC. As soon asD. Before答案：B。
“when”在此表示一个动作正在进行时，另一个动作突然发生，“我正在公园散步时，看到了一只漂亮的鸟”。
“while”强调两个动作同时持续进行，不太符合。
“as soon as”表示“一……就……”，逻辑不符。
“before”表示“在……之前”，不符合语境。
3. He didn't come home ______ it was dark.A. untilB. whileC. whenD. as答案：A。
“not...until...”是固定搭配，表示“直到……才……”，“他直到天黑才回家”。
“while”“when”“as”都没有这种“直到”的意思。
4. ______ she was reading the book, she fell asleep.A. WhileB. WhenC. AsD. Since答案：A。
“while”强调在“她读书”这个动作进行的过程中“睡着了”。
“when”更多表示动作的先后发生。
“as”有“随着”的意思，不太符合。
“since”表示“自从”，不符合句意。
5. I'll call you ______ I arrive in Beijing.A. whileB. whenC. as soon asD. until答案：C。
状语从句翻译练习
一、时间状语从句1、当我进屋时，他正在写信。
2、我们什么时间有空，我们就去那里。
3、我正在街上走着，这时忽然有人从后面拍我的肩膀。
4、天下雨的时候，他们出去了5、他不在的时候我在。
6、他赶快回家，不时地一边走一边向后看。
7、先做学生，再做先生。
8、比赛开始后，他到了。
9、我们一直等到他回来。
10、她到11点钟才停止工作。
11、她站在那里看着，直到看不见他的身影。
12、自从1978年以来中国发生了巨大的变化。
13、我一到上海就给你写信。
14、我刚一到家，就下雨了15、我们刚到车站，火车就走了。
16、我们刚开始就被叫停。
17、我每次乘船都晕船。
18、我一听到这首歌，就感到很愉快。
19、下次你来的时候，就会见到他。
二、地点状语从句1、有志者，事竟成。
2、哪里有水，哪里就有生命。
3、你可以随意到你喜欢的任何地方去。
4、无论你去哪都要遵守法律。
三、原因状语从句1、昨天我回来晚了，因为我值班。
2、既然大家都到了，我们开始开会。
3、由于他英语懂得不多，他在字典中查阅这个单词。
4、鉴于天气已经晴朗，我们可以启程了。
5、鉴于他病情严重，我们派人去请医生去了。
4、目的状语从句1、我要把你的电话号码记下来，以免忘记。
2、我把真实情况告诉你，使你能自己作出判断。
3、他们比往常更加努力工作，为了能提前完成工作。
4、多穿点衣服，以免患感冒。
五、结果状语从句1、我们把收音机的音量放大，大家都听到了新闻。
2、他十分激动，以致一句话都说不出来。
3、他说出了这么重要的理由，得到大家的谅解。
4、这是一本十分有意思的书，大家都想看。
六、条件状语从句1、如果我们不怕困难，困难就算不了什么了。
2、除非下雨，我们明天就去那里。
3、只要你努力工作，你就一定能成功。
4、万一我忘了，请提醒我一下。
5、据我所知，那本书下月出版。
七、方式状语从句1、按照我教你的画一只猫。
2、按照人家告诉你做的去做。
3、看上去她好象是生病了。
4、他的行动就好象什么也没有发生。
【英语】英语状语从句专项训练100(附答案)及解析
A．unlessB．whenC．ifD．Since
【答案】A
【解析】
【分析】
【详解】
句意：我喜欢新鲜空气，因此我总是让窗户开着，除非真的很冷。考查连词辨析。A．Unless除非，相当于if not，表条件；B．When当……的时候；C．If如果，表条件；D．Since自从。根据I enjoy fresh air so always sleep with the window open可知除非真的很冷否则总是让窗户开着，unless符合题意，故选A。
12．_____there was no obvious evidence, most people didn’t think he was guilty of the robbery.
A．WhenB．WhileC．SinceD．As
【答案】C
【解析】
【详解】
句意“由于没有明显的证据，大多数人认为他没有犯抢劫罪”。A.当……时候（引导时间状语从句）；B.当……时候（引导时间状语从句）；C.since“因为”、“既然”，侧重主句，从句表示显然的或已为人所知的理由，语气比because稍弱；D. as因为，表示的“原因”是双方已知的事实或显而易见的原因，或者理由不是很重要。根据句意可知，因为没有明显的证据，且这个理由很重要，所以人们认为他没有犯抢劫罪，故选C
--- Wonderful. It’s years ____ I enjoyed myself so much.
A．sinceB．afterC．whenD．before
(完整版)状语从句40题附答案
状语从句40题附答案1. —What are you going to do this summer?—rm going to visit the Great Wall __________ the school term en ds.A. so thatB. as soon asC. beforeD. in order that2. My En glish is very poor. I can't lear n it well ________ you help me.A. ifB. unl essC. whileD. whe n3. I was toldBill Gates was thirteen he began to play with computers.A. that howB. how thatC. whe n thatD. that whe n4. ——Do you have any problems if you five minu tes toread?—Well, I'm thinking about the new words. There are too many.A. giveB. givedC. are give nD. were give n5. His father has worked for 17years in this factory ___________ he came here in 2000.A. sinceB. forC. whe nD. how long6. This less on was so bori ng __ some stude nts bega n to sleep in class.A. thatB. andC. whe nD. how7. You can make progress in En glish ________ you try your best.A. beforeB. unl essC. whetherD. as long as8. _______ he has little kno wledge, the old worker has a lot of experie nee.A. IfB. BecauseC. AlthoughD.whe n9.1 will lend you my computer _____ you promise to return it on time.A. sinceB.whe nC. on con diti on thatD.i n order that10. A true friend can see the pain in your eyes ____ every one else believes the smile on your face.A. whileB. becauseC. beforeD. un til11. The movie is a great success, _________ it's not very good.A. soB. butC. althoughD. and12. Jack was ' t saying anything,but the teacher smiled at him he had done someth ing very clever.A.i n caseB.as ifC.wileD.though13. I n the exam, the _______ you are, the _______ mistakes you will make.A. careful; littleB. more careful; fewestC. more careful; fewerD. more careful; less14. This is an interesting book, _________ I ' ll buy it, .A.how much may it costB. however it may costC. how may it costD. no matter how it may cost15. Today we will beg in ____ w e stopped yesterday so that no point will be leftout.A.whe nB.whereC.howD.what16. —Does Ted tell you if he ________ n ext Su nday?—No, he does n't. But if he ________ , I'll give you a ring.A. will come ; comesB. comes; will comeC. comes ; comesD. will come; will come17. The bus driver always says to us , “ Don't get off ______ the bus stops.A. whe nB. while C .un til D. if18. You speak in a low voice, Danny. Please speak loudly _____ I can hear you clearly.A. thoughB. so thatC. butD. uni ess19. ___ y ou keep on trying, I really don' mind whetheryou can come up top in your class.A.As long asB.Eve n thoughC.As soon asD.The mome nt20. —Yesterday there were ___ many people in the park ______ I almost lostmy way.—It was the May Day holiday. Lots of people wan ted to have fun there.A. quite; thatB. very; thatC. eno ugh; thatD. so; that21. I won't believe you __ I have seen it with my own eyes.A. beforeB. un tilC. afterD. whe n22.Some people are holding their umbrellas ___ it is raining.A. in caseB.so thatC.as thoughD.unl ess23. —We'll go for a picnic if it _______ t his Su nday.—Wish you a lovely weeke nd.A. rainB. rainsC. won't rainD. does n't rain24. —You speak ____ fast _____ we can ' t follow you.—I will speak slowly.A.so; thatB. such; thatC. such a; thatD. too; to25. She __ home ___ she was satisfied ___ his an swer yesterday.A. did n't go; un til; toB. was n't go; after; toC. does n't go; before; withD. did n't go; un til; with26. There are always __ in terest ing stories in the series that __ many people watch them.A. so, soB. such, suchC. such, soD. so, such27. we won ' t change our plan, __ it rains.A.becauseB.sinceC. as ifD. even if28. You should finish your less ons _____ you go out to play.A. beforeB. afterC. whe nD. while29. Project Hope has raised much money __________ t he poor childre n can go to school.A. becauseB. so thatC. in order toD. though30. Teresa is ________ n ervous _______ she can't talk in front of the class.A. such, thatB. too, toC. so, thatD.too,that31. These days the long TV play is popular my mother oftenkeep watch ing it for twohours without a rest a day .A. such, thatB. too , toC. very , thatD. so , that32. The meeti ng did n't start _ e very one was there.A. becauseB. un tilC. whyD. if33. Stay ing in a hotel costs ren ti ng a roon in an apartroom for a week.A.twice as more asB.as more twice asC.twice as much asD.as much twice as34. He took off his coat _______ h e felt hot.A. becauseB. asC. ifD. since35. _________ a fter the daily hard work, Mo Yan was hungry for books.A.Tired as was heB. As tired he wasC. As he was tiredD. Tired as he was36. When you read the book, you' dbetter make a mark _________ you have any questi ons.A. whichB. thatC. whereD. though37. _______ hamburgers are junk food, ___________ m any childre n like them.A. Although; /B. Although; butC. Because; /D. Because, so38. Literature must con sist of words, ___ music son sist of soun ds.A.eve n thoughB.so thatC.just asD.eve n si nee39. I was late for class yesterday _______ there was someth ing wrong with my bike.A. whenB. thatC. untilD. because40. —The doctor told me not to eat too much, but I found it difficult.—The doctor is right. _______ you eat, _____ you will be.A. The less, the healthierB. The less; the more healthilyC. The more; the healthierD. The more; the more healthily 1~5BBDCA 6~10ADCCA 11~15CBCBB 16~20ACBAD 21~25CADAD 26~30CDABC 31~35DBCAD 36~40CACDA。
(word完整版)高考英语状语从句40题附答案
高考英语状语从句40题附答案1.—Wha.ar.yo.goin.t.d.thi.summer?—I'm going to visit the Great Wall __________ the school term ends.A.s.tha.B.a.soo.as.C.before.D.i.orde.that2.M.Englis.i.ver.poor..can'.lear.i.wel._________.yo.hel.me.A.if.B.unless.C.while.D.when3..wa.tol._____puters.A.tha.ho..B.ho.tha..C.whe.tha..D.tha.when4.—D.yo.hav.an.problem.i.yo._______.fiv.minute.t.read?—Well.I'.thinkin.abou.th.ne.words.Ther.ar.to.many.A.giv..B.give..C.ar.give..D.wer.given5.His father has worked for 17years in this factory __________ he came here in 2000.A.since.B.for.C.whenD.ho.long6.Thi.lesso.wa.s.borin.___.som.student.bega.t.slee.i.class.A.that .B.and .C.when .D.how7.You can make progress in English __________ you try your best.A.befor.B.unless.C.whether.D.a.lon.as.8._______.h.ha.littl.knowledge.th.ol.worke.ha..lo.o.experience.A.I.B.Becaus..C.Althoug.D.when9.I will lend you my computer you promise to return it on time.A.sinc..B.whe..C.o.conditio.tha..D.i.orde.that10..tru.frien.ca.se.th.pai.i.you.eye.____.everyon.els.believe.th.smil.o.you.face.A.whil..B.becaus..C.befor..D.until11.Th.movi.i..grea.success._________.it'.no.ver.good.A.s..B.bu..C.althoug..D.and12.Jac.was’.sayin.anything,bu.th.teache.smile.a.hi.. h.ha.don.somethin.ver.clever.A.in caseB.as ifC.wileD.though13.I.th.exam.th._______.yo.are.th.______.mistake.yo.wil.make.A.careful.littl..B.mor.careful.fewes..C.mor.careful.fewe..D.mor.careful.less14.Thi.i.a.interestin.book...... I’l.bu.it... .A.ho.muc.ma.i.cos..B.howeve.i.ma.cos.C.ho.ma.i.cos....D.n.matte.ho.i.ma.cos.15.Today we will begin we stopped yesterday so that no point will be left out.A.whenB.whereC.howD.what16.—Does Ted tell you if he __________ next Sunday?—No.h.doesn't.Bu.i.h.________.I'l.giv.yo..ring.e...e..e17.Th.bu.drive.alway.say.t.u.,“Don'.ge.off_______.th.bu.stops.”A.whe...B.whil.....unti...D.i.18.Yo.spea.i..lo.voice.Danny.Pleas.spea.loudl.____..ca.hea.yo.clearly.A.thoug..B.s.tha..C.bu..D.unless19.____ you keep on trying, I really don’t mind whethe.you can come up top in your class.A.As long asB.Even thoughC.As soon asD.The moment20..Yesterda.ther.were ... .man.peopl.i.th.par.... .almos.los.m.way..I.wa.th.Ma.Da.holiday.Lot.o.peopl.wante.t.hav.fu.there.A.quite.that .B.very.tha.C.enough.that .D.so.tha.21..won'.believ.you__..hav.see.i.wit.m.ow.eyes...A.befor..B.unti..C.afte..D.when22.Some people are holding their umbrellas ____ it is raining.A. in caseB.so thatC.as thoughD.unless23.—We'l.g.fo..picni.i.i._______.thi.Sunday.— Wish you a lovely weekend.A.rai..B.rain..C.won'.rai..D.doesn'.rai.24.—You speak _____ fast _____ we can’t follow you.—I will speak slowly.A.so.that .B.such.tha.C.suc.a.tha.D.too.to25.Sh.__.hom.__.sh.wa.satisfie.__.hi.answe.yesterday...A.didn'.go.until.t....B.wasn'.g o.after.t...C.doesn'.go.before.wit..D.didn'.go.until.with26.There are always ____interesting stories in the series that ___ many people watch them.A. so.so .B.such.suc..C.such.so ..D.so.such27.we won’t change our plan, it rains.A.becaus..B.sinc..C.a.i.D.eve.i.28.Yo.shoul.finis.you.lesson.______.yo.g.ou.t.play.A.befor.B.afte.C.whe.D.while29.Projec.Hop.ha.raise.muc.mone._________.th.poo.childre.ca.g.t.school.A.because.B.s.tha..C.i.orde.to.D.though30.Teres.i._______.nervou._______.sh.can'.tal.i.fron.o.th.class.A.such.tha..B.too.t..C.so.tha..D.too,that31.These days the long TV play is popular my mother often keep watching it for twohours without a rest a day .A.such.that .B.to..t..C.ver..that .D.s..that32.Th.meetin.didn'.start__.everyon.wa.there.A.becaus..B.unti..C.wh..D.if33.Stayin.i..hote.cost.... rentin..roo.i.a.apartroo.fo..week.A.twice as more asB.as more twice asC.twice as much asD.as much twice as34.H.too.of.hi.coa.______.h.fel.hot.A.becaus.B.a.C.i.D.since35._________.afte.th.dail.har.work.M.Ya.wa.hungr.fo.books.A.Tire.a.wa.h..B.A.tire.h.wa..C.A.h.wa.tire..D.Tire.a.h.was36.Whe.yo.rea.th.book.you’.bette.mak..mar.______.yo.hav.an.questions.A.whic.B.tha.C.wher.D.though37._________ hamburgers are junk food, __________ many children like them.A.Although...B.Although.bu..C.Because...D.Because.so38.Literature must consist of words, music sonsist of sounds.A.even thoughB.so thatC.just asD.even sincet.fo.clas.yesterda.______.ther.wa.somethin.wron.wit.m.bike.A.whe.B.tha.C.unti.D.because40..Th.docto.tol.m.no.t.ea.to.much.bu..foun.i.difficult.—Th.docto.i.right.________.yo.eat._____.yo.wil.be.A.Th.less.th.healthie...B..Th.less.th.mor.healthilyC.Th.more.th.healthie..D.Th.more.th.mor.healthily1~5BBDCA 6~10ADCCA11~15CBCBB 16~20ACBAD21~25CADAD 26~30CDABC31~35DBCAD 36~40CACDA。
（完整版）状语从句练习题及答案）
（完整版）状语从句练习题及答案）状语从句练习题1.I ' ll let you know ___ he comes back.A. beforeB. becauseC. as soon asD. although2. She will sing a song __ she is asked.A. ifB. unlessC. forD. since3. We will work ___ we are needed.A. wheneverB. becauseC. sinceD. wherever4. Read it aloud ___ the class can hear you.A. so thatB. ifC. whenD. although5. ____ you go, don't forget your people.A. WheneverB. HoweverC. WhereverD. Whichever6. It is about ten years ___ I met you last.A. sinceB. forC. whenD. as7. They will never succeed, ____ hard they try.A. becauseB. howeverC. whenD. since8. __ still half drunk, he made his way home.A. WhenB. BecauseC. ThoughD. As9. __ she was very tired, she went on working.A. AsB. AlthoughC. EvenD. In spite of10. Busy ___ he was, he tried his best to help you.A. asB. whenC. sinceD. for11. I learned a little Russian ___ I was at middle school.A. thoughB. althoughC. as ifD. when12. __ we got to the station, the train had left already.A. IfB. UnlessC. SinceD. When13. __ the rain stops, we' 11 set off for the station.A. BeforeB. UnlessC. As soon asD. Though14. She was ___ tired ____ she could not move an inch.A. so, thatB. such, thatC. very, thatD. so, as15. We didn ' t go home ___w_e_finished the work.A. sinceB. untilC. becauseD. though16. I'll stay here ___ everyone else comes back.A. even ifB. as thoughC. becauseD. until17. Although it's raining, ___ are still working in the field.A. theyB. but theyC. and theyD. so they18. Speak to him slowly ___ he may understand you better.A. sinceB. so thatC. forD. because19. You'll miss the train ____ you hurry up.A. unlessB. asC. ifD. until20. When you read the book, you' d better make a mark ___ you have any questions.A. at whichB. at whereC. the placeD. where21. We'd better hurry ____ it is getting dark.A. andB. butC. asD. unless22. I didn' t manage to do it ___ you had explained how.A. untilB. unlessC. whenD. before23. ____ he comes, we won't be able to go.A. WithoutB. UnlessC. ExceptD. Even24. I hurried ____ I wouldn't be late for class.B. so thatC. as ifD. unless25. ___ I catch a cold, I have pain in my back.A. Every timeB. ThoughC. EvenD. Where26. What's the matter __ they still haven't answered the telegram?A. whenB. thatC. thoughD. however27. Bring it nearer ___ I may see it better.A. althoughB. even thoughC. so thatD. since28. You may arrive in Beijing early ___ you mind taking the night train.A. thatB. thoughC. unlessD. if29. Helen listened carefully ___ she might discover exactly what she needed.A. in thatB. in order thatD. even though30. More people will eat out in restaurants ___ they do today.A. thanB. whenC. whileD. as31. ____ hard she tries, she can hardly avoid making mistakes in her homework.A. MuchB. HoweverC. AsD. Although32. Poor ___ it may be, there is no place like home, ____ you may go.A. as; whereverB. though; wheneverC. in spite of; whenD. that; wherever33. The child was __ immediately after supper.A. enough tired to go to bedB. too tired to go to bedC. so tired that he went to bedD. very tired, he went to bed34. The history of nursing __ the history of man.A. as old asB. is old thanC. that is as old asD. is as old as35. __ born in Chicago, the author was famous for his storiesabout New York.A. SinceB. OnceC. WhenD. Although36. ____ we stood at the top of the building, the people below were hardly visible.A. AsB. AlthoughC. UnlessD. In spite of37. Scarcely was George Washington in his teens ___ his father died.A. thanB. asC. whileD. when38. ___ David goes, he is welcome.A. WhicheverB. HoweverC. WhereverD. Whatever39. The house stood ___ there had been a rock.A. whichB. at whichC. whenD. where40. Small ___ it is, the pen is a most useful tool.A. becauseB. soC. ifD. as41. After the new technique was introduced, the factory produced ___ tractors in 1988 as the year before.A. as twice manyB. as many twiceC. twice as manyD. twice many as42. The piano in the other shop will be ___ , but ____ .A. cheaper; not as betterB. more cheap; not as betterC. cheaper; not as goodD. more cheap; not as good43. John plays football __ , if not better than, David.A. as wellB. as well asC. so wellD. so well as44. Although he is considered a great writer,A. his works are not widely readB. but his works are not widely readC. however his works are not widely readD. still his works are not widely read45. ___ the day went on, the weather got worse.A. WithB. SinceC. WhileD. As46. —What was the party like?—Wonderful. It' s years __ I enjoyed myself so much.A. afterB. whenC. beforeD. since47. It was not ___ she took off her dark glasses _____ I realized she was a famous film star.A. when; thatB. until; thatC. until; whenD. when; then 48. If we work with a strong will, we canovercome any difficulty, ___ great it is.A. whatB. howC. howeverD. whatever49. After the war, a new school building was put up ___ there had once been a theatre.A. thatB. whereC. whichD. when50. ____ , Mother will wait for him to have dinner together.A. However late is heB. However he is lateC. However is he lateD. However late he is51. He will come to call on you the moment he __ his painting.A. will finishB. finishedC. has finishedD. had finished52. __ difficult the task may be, we will try our best to complete it in time.A. No matterB. No wonderC. ThoughD. However53. It was ___ that she couldn 't finish it by herself.A. so difficult a workB. such a difficult workC. so difficult workD. such difficult work1-5 CADAC 6-10 ABCBA 11-15 DDCAB 16-20 DABAD 21-25 CABBA26-30 BCCBD 31-35 BACDD 36-40 ADCDD 41-45 CCBAD 46-50 DBCBD51-53 CDD 三．高考试题分析：1． you' ve got a chance, you might as well make full use of it. （1999 高考）A. Now thatB. AfterC. AlthoughD. As soon as试题分析：主句与从句之间存在因果关系；且"you' ve got a chanee”表示一个显而易见的原因，因此应选用表原因的now that "既然"。
状语从句练习题(含答案)经典
【答案】A
【解析】
【详解】 句意：妈，这周末我能去看《流浪地球吗》？我不想错过这部电影。可以，如果你的作业 完成。
考查被动语态、条件状语从句。A. is finished（一般现在时，被动语态）；B. will finish（一 般将来时）；. finishes（一般现在时）；D. will be finished（一般将来时，被动语态）；if引 导条件状语从句，主句是将来时，从句用一般现在时表将来；从句的主语是your homework判断用被动语态，故选A。
候；although尽管，虽然；so that以至于，为的是；as soon as一⋯就⋯。根据句意可知，空后all of us could understand her表示前面explained⋯clearly的目的，故用so that引导目 的状语从句，选C。
14．—the workers are very tired,they keep on working.
13．Mrs. Smith explained the problem clearlyall of us could understand her.
A．untilB．althoughC．so thatD．as soon as
【答案】C
【解析】
【详解】
句意：Smith夫人清楚地解释了这个问题，以至于我们所有人都能明白她。until直到⋯时
A．beforeB．whenC．afterD．though
【答案】B
【解析】
【详解】
句意：--当我有空的时候，我通常选择乘火车去旅行。--我也是。我认为在火车上我们可以
【助力2024】高考英语 语法专题复习精练：状语从句(含2024试题1)
2.(2024课标卷)34. You have to move out of the way the truck cannot get past you.A. soB. orC. andD. but【答案】B【解析】考查并列连词。
上下文存在着逻辑上的条件关系，所以用“or”意为“否则的话”。
句意：你得挪一挪位置，否则卡车过不去。
4.(2024北京卷)21.—Look at those clouds!—Don’t worry. ______ it rains, we’ll still have a great time.A. Even ifB. As thoughC. In caseD. If only【答案】A【解析】考查状语从句。
even if 即便，as though好像，in case 以防，if only要是…...多好啊。
句意：—看看那些云！—不用担忧。
即使下雨，我们也会玩得很快乐的。
5.(2024天津卷)14.Everything was placed exactly ___________he wanted it for the graduation ceremony.A. whileB. whenC. whereD. though【答案】C【解析】考查状语从句。
地点状语从句。
句意：毕业典礼所须要的东西都被放在了他想放的地方了。
7.(2024上海卷)40.The map is one of the best tools a man has _ _ he goes to a new place.A. wheneverB. whateverC. whereverD. however【答案】A【解析】考查状语从句。
从句中有“地点a new place”作宾语，故解除BC选项。
很明显本句是时间状语从句。
句意：一个人无论什么时候到了一个新地方，地图就是他运用的最好的工具之一。
8.(2024重庆卷) 30.—Coach, can I continue with the training?—Sorry, you can’t ______you haven’t recovered from the knee injury.A. untilB. beforeC. asD. unless【答案】C【解析】考查状语从句。
完整版)初中英语状语从句专项练习
完整版)初中英语状语从句专项练习状语从句练一、基础练1.We were watching TV when we caught sight of a friend of ours.2.The price of diamond rings has risen sharply。
while the price of gold rings has gone down.3.This sentence means "I haven't seen you for a long time."4.I'll call you as soon as I get there.5.Before he finished his work。
he left hurriedly.6.You'll surely make progress if you work with a strong will.7.Whatever people say。
I am sure that he is honest.8.It won't be long before you regret what you've done.9.I'll leave him a note so that he'll know where we are.12.When reading the book。
it's better to make a mark if you have any ns.13.The teacher raised his voice so that all the students could hear him.14.He took off his coat because he felt hot.15.It is such a lovely day that we'd like to go out for a walk.16.Mary had so much work that she stayed at her office all day.17.Although I XXX。
专项训练状语从句试题和答案含答案解析
专项训练状语从句试题和答案含答案解析一、初中英语状语从句1．----Mike wants to know if ________ a picnic tomorrow.---- Yes. But if it ________, we will visit the museum instead.A．you have; will rain B．you will have; will rainC．you will have; rains D．will you have; rains【答案】C【解析】试题分析：句意：--汤姆想知道明天你是否去野炊。
--是的，但是如果下雨的话，我们将改去参观博物馆。
if意为“是否”时，引导宾语从句，句中有tomorrow，用一般将来时态，第二空中if引导条件状语从句意为“假如”，主句用将来时从句用一般现在时表示将来，故选C 。
考点：考查动词的时态。
2．—I’m going to the post office.—________you are there, can you get me some stamps?A．When B．While C．Because D．If【答案】B【解析】试题分析：A. As 一边…一边，作为 B. While当…时候 C. Because 因为 D. lf假如；句意：我将要去邮局。
你去那里的时候，能不能给我带一些邮票呢？故选B考点：连词点评：连词在中考中涉及到的很多，尤其在宾语从句、状语从句、定语从句中连词是必考点。
平时学习过程中，掌握连词的意思，及所表示的关系是至关重要的，这种关系的判断可以通过句子意思的理解来选择恰到的连词。
3．-Is your WeChat account （账户） safe?-Yes, even my father can't use it __________ I tell him the password.A．when B．unless C．while D．if【答案】B【解析】【详解】句意：-你的微信账号安全吗？-是的，如果我不告诉他密码甚至我的爸爸都不能使用它。
英语状语从句练习题20篇及解析
英语状语从句练习题20篇及解析一、初中英语状语从句1．I didn’t believe I could do it ____ I got to the top of Mount Tai.A．unless B．until C．after D．as【答案】B【解析】试题分析：句意：直到我到达泰山顶上我才相信我能成功。
A. unless如果不，除非，引导条件状语从句；B. until 直到，引导时间状语从句；C. after 在……后，引导时间状语从句；D. as因为，由于，引导原因状语从句。
not …until直到……才，结合句意，故选B。
考点：考查连词的用法。
2．You'd better get home earlier today we can go out for a big meal.A．in order to B．such that C．so that D．in order【答案】C【解析】句意：你最好今天早点回家，这样我们就可以出去吃大餐了。
A. in order to 为了，后跟动词原形；B. such that没有此用法；C. so that为了，引导目的状语从句；D. in order+that+从句，引导目的状语从句。
we can go out for a big meal表示目的的完整句子，所以使用连词词组so that。
故选：C。
3．— _______ good time we had at the party last night!— Yes. It was _______exciting party that I would never forget it.A．What; so B．How; such C．What a; such an D．How a; so an【答案】C【解析】【详解】试题分析：句意：昨天晚上我们在聚会上玩的是多么开心呀！是的，它是如此的令人兴奋以至于我永远不会忘记它。
初三英语状语从句练习题30题
初三英语状语从句练习题30题1.We will go for a picnic if it ____ sunny tomorrow.A.isB.will beC.wasD.has been答案：A。
if 引导的条件状语从句，遵循“主将从现”原则，即主句用一般将来时，从句用一般现在时。
B 选项will be 是将来时，不符合；C 选项was 是过去时，不符合；D 选项has been 是现在完成时，不符合。
2.I was doing my homework when my mother ____ home.A.cameesC.will comeD.would come答案：A。
when 引导的时间状语从句，主句用过去进行时，从句用一般过去时。
B 选项comes 是一般现在时，不符合；C 选项will come 是将来时，不符合；D 选项would come 是过去将来时，不符合。
3.As soon as I finish my homework, I ____ play basketball.A.willB.wouldC.wasD.am答案：A。
as soon as 引导的时间状语从句，遵循“主将从现”原则，即主句用一般将来时，从句用一般现在时。
B 选项would 是过去将来时，不符合；C 选项was 是过去时，不符合；D 选项am 是一般现在时，不符合。
4.We have been friends ____ we met at school.A.sinceB.whenC.beforeD.after答案：A。
since 引导的时间状语从句，主句用现在完成时，从句用一般过去时。
B 选项when 表示当……时候，不符合；C 选项before 表示在……之前，不符合；D 选项after 表示在……之后，不符合。
5.I will call you ____ I arrive in Beijing.A.as soon asB.whenC.beforeD.after答案：A。
状语从句练习题(含答案)经典
状语从句练习题(含答案)经典一、初中英语状语从句1．Life is like climbing a mountain. ______ you feel tired, you will enjoy the beautiful view at the top of the mountain.A．Since B．Unless C．Though D．Because【答案】C【解析】【详解】句意：生活就像爬山。
虽然你感到累，但你会在山顶欣赏美丽的景色。
考查状语从句；since 自从，引导时间状语从句；unless 除非，引导条件状语从句；though 虽然，引导让步状语从句；because 因为，引导原因状语从句。
此处表示让步关系，故选C。
2．—I’m going to the post office.—________you are there, can you get me some stamps?A．When B．While C．Because D．If【答案】B【解析】试题分析：A. As 一边…一边，作为 B. While当…时候 C. Because 因为 D. lf假如；句意：我将要去邮局。
你去那里的时候，能不能给我带一些邮票呢？故选B考点：连词点评：连词在中考中涉及到的很多，尤其在宾语从句、状语从句、定语从句中连词是必考点。
平时学习过程中，掌握连词的意思，及所表示的关系是至关重要的，这种关系的判断可以通过句子意思的理解来选择恰到的连词。
3．Our teachers have been with us for nearly three years we came to junior high school. We should thank them for what they have done for us.A．until B．before C．since D．while【答案】C【解析】句意：自从我们来到初中，我们的老师们已经和我们在一起将近三年了，我们应该感谢他们为我们所做的一切。
(英语)状语从句练习题含答案及解析精选全文完整版
可编辑修改精选全文完整版（英语）状语从句练习题含答案及解析一、初中英语状语从句1．--Has the meeting begun yet？--Not yet． We have to wait everyone is here．A．and B．until C．or D．but【答案】B【解析】【详解】考查连词用法。
句意：—会议已经开始了吗？—不，还没有。
我们必须等到大家都到齐了。
and和；until直到；or或者、否则，but但是。
根据题干可知我们得等到大家都到了，这里表示直到……时候用until．故选B．2．-Have you improved your spoken English？-Not yet．I'll try my best______I am not good at it now．A．so B．although C．but D．until【答案】B【解析】【详解】句意：——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．考查连词辨析。
A. so所以；B. although 虽然；C. but但是；D. until直到。
根据语境推测句意是——你提高你的英语口语了吗？——还没有．虽然我现在还不擅长，但是我会尽力的．在这里两个句子之间存在一个相反的让步关系，though/although/even though“虽然；尽管”，引导让步状语从句，故选B．【点睛】本题主要考查连词的用法，连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词．前后句之间是让步关系．3．You will fall behind others ______ you work hard.A．if B．unless C．though D．since【答案】B【解析】试题分析：句意：如果你不努力学习，你会落后别人。
状语从句练习题及答案
状语从句练习题及答案1. 尽管他很努力，但他没有通过考试。
- 答案：Though he studied hard, he did not pass the exam.2. 我们一到达那里，就立即开始工作。
- 答案：As soon as we arrived there, we started working immediately.3. 只有当你准备好了，我们才会开始。
- 答案：We will start only when you are ready.4. 因为天气不好，比赛被推迟了。
- 答案：Because the weather was bad, the match was postponed.5. 无论何时你来，我都会在这里等你。
- 答案：Whenever you come, I will be here waiting for you.6. 如果你不介意的话，我可以借你的书。
- 答案：If you don't mind, I can borrow your book.7. 除非他改变态度，否则他将不会成功。
- 答案：Unless he changes his attitude, he will not succeed.8. 他如此专心于工作，以至于没有听到电话响。
- 答案：He was so absorbed in his work that he didn't hear the phone ring.9. 她一完成作业，就出去和朋友见面了。
- 答案：She went out to meet her friends as soon as she finished her homework.10. 只要我们团结一致，我们就能克服任何困难。
- 答案：As long as we stand united, we can overcome any difficulty.答案解析- 状语从句通常位于主句之前或之后，有时也可以用逗号与主句隔开。
状语从句练习(含答案和解析)
状语从句练习(含答案和解析)一、选择题1. — Could you please tell me ________________?— Sure, it was invented by Thomas Edison in 1879.A. when was the light bulb inventedB. when the light bulb was inventedC. the light bulb was invented whenD. when the invented the light bulb【答案】B【解析】在宾语从句中，应该使用陈述语序，所以答案选B。
2. — She hurt herself while she ________________ the piano. — Oh no, hope she's okay.A. playedB. is playingC. was playingD. had played【答案】C【解析】句子发生的时间是过去，所以应该使用过去进行时，答案选C。
3. The book is not on the table, ________________ I last saw it.A. soB. becauseC. butD. although【答案】A【解析】根据句意，表达的是因果关系，所以应该使用连词so，答案选A。
4. I'll join you for dinner ________________ it doesn't rain.A. whetherB. ifC. soD. because【答案】B【解析】根据句意，表示条件，所以应该使用if，答案选B。
5. — ________________ you study hard, you won't pass the exam.— I know, I'll try my best.A. IfB. UnlessC. WhetherD. Although【答案】B【解析】根据句意，表示否定条件，所以应该使用unless，答案选B。
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状语从句专项练习经典一、初中英语状语从句1．—Mom, may I see the movie The Wandering Earth this weekend? I don't want to miss it.—Sure, if your homework___.A．is finished B．will finish C．finishes D．will be finished【答案】A【解析】【详解】句意：妈，这周末我能去看《流浪地球吗》？我不想错过这部电影。
可以，如果你的作业完成。
考查被动语态、条件状语从句。
A. is finished（一般现在时，被动语态）；B. will finish（一般将来时）；. finishes（一般现在时）；D. will be finished（一般将来时，被动语态）；if引导条件状语从句，主句是将来时，从句用一般现在时表将来；从句的主语是your homework判断用被动语态，故选A。
2．I won't go he comes back.A．until B．while C．when D．why【答案】A【解析】句意：直到他回来，我才走。
A. until 直到； B. while当---时候； C. when当---时候； D. why为什么；not---until--- 直到---才---；故选A3．Daming hasn't done much exercise _______ he got his computer.A．when B．if C．though D．since【答案】D【解析】试题分析：句意：自从有了电脑，大卫就没有做许多运动了。
A. when当……时；指时间；B. if如果，表示条件；C. though虽然，尽管，表示让步；D. since自从，表示时间的起点。
不锻炼是从有电脑开始的，表示时间的起点，用since。
故选D。
考点：考查连词辨析。
4．I didn’t believe I could do it ____ I got to the top of Mount Tai.A．unless B．until C．after D．as【答案】B【解析】试题分析：句意：直到我到达泰山顶上我才相信我能成功。
A. unless如果不，除非，引导条件状语从句； B. until 直到，引导时间状语从句； C. after 在……后，引导时间状语从句； D. as因为，由于，引导原因状语从句。
not …until直到……才，结合句意，故选B。
考点：考查连词的用法。
5．It’s much easier for us to become friends________ we share similar interests.A．unless B．when C．even though D．so that【答案】B【解析】【详解】句意：当我们分享相似的兴趣爱好时，对于我们来说成为朋友更加容易一些。
考查连词。
unless如果不，除非，引导条件状语从句；when当……时候，引导时间状语从句；even though尽管，引导让步状语从句；so that以便，因此，结果，引导目的或结果状语从句。
根据句意可知此句表示时间，故填when，选B。
6．Betty you the answer as soon as she works it out later.A．tells B．told C．will tell D．is telling【答案】C【解析】【详解】句意：贝蒂之后一算出来，她就会告诉你答案。
考查时态。
tells告诉，一般现在时；told一般过去时；will tell一般将来时；is telling现在进行时。
as soon as表示“一……就……”。
由as soon as引导的从句需要用一般现在时态代替将来时态，可知主句时态是一般将来时。
故选C。
7．Mrs. White walks a dog in the park nearby every morning it’s rainy o r windy.A．since B．because C．unless D．until【答案】C【解析】试题分析：句意：如果不刮风下雨，怀特夫人就会带狗到附近的公园散步。
A.. since自从；B.. because因为；C.. unless如果不；D. .until直到……才。
结合句意，故选C考点：考查连词的用法。
8．He has made great progress his mother is very pleased with him.A．so；that B．enough；to C．so；too D．such；that【答案】D【解析】【详解】句意：他已经取得了如此大的进步以至于他的妈妈对他非常满意。
从句意可知这里需要用到“如此….以至于”so+形容词/副词+that或such+名词+that，根据句子中的great progress意思是很大的进步，是名词短语，故用such…that, 故选D。
9．—Leonardo didn't win an Oscar he acted in The Revenant（荒野求生）.一Yeah. It was hard for him to realize this dream, but he never gave up.A．after B．since C．when D．until【答案】D【解析】句意：——列奥纳多直到他在《荒野求生》中才获得奥斯卡奖。
——是的。
对他来说很难实现这个梦想，但他从不放弃。
考查连词辨析题。
A. after在……以后；B. since自从……；C. when当……时候；D. until直到……才，多和not连用。
本句是时间状语从句，四个选项都可做引导词；根据Leonardo didn't win an Oscar和答语中的but he never gave up.，结合句意结构和语境，可知until符合句意，故选D。
10．___________ she couldn’t see his face, she could tell by his voice that he was young. A．Unless B．If C．Because D．Though【答案】D【解析】【详解】句意：虽然她看不见他的脸，但是她能够通过声音分辨出他很年轻。
A. Unless除非；B. If 如果；C. Because因为；D. Though尽管。
根据语境以及上下文，本题考查的是连词的用法。
结合句意可知，在这里两个句子之间存在一个相反的让步关系，though/although/even though"虽然；尽管"，引导让步状语从句，符合句意。
故答案选D。
11．The nurse won't leave her patients________she's sure they are all taken good care of. A．unless B．because C．since D．if【答案】A【解析】句意：这个护士不会离开她的病人，除非她确定病人们都被照顾得很好。
because因为，引导原因状语从句；since自从，引导时间状语从句；既然，引导原因状语从句；if如果，引导条件状语从句；unless除非，如果不，引导条件状语从句。
根据句意可知，这里考查的是从属连词unless，故选A。
12．－What’s your opinion about friends?－They are like books. We don’t need a l ot of them they’re good.A．as long as B．as soon as C．so that D．as if【答案】A【解析】【详解】句意“-关于朋友，你的观点是什么？-他们像书，只要他们好，我们不需要太多”。
A.只要（引导条件状语从句）；B.一……就……（引导时间状语从句）；C.目的是，为的是（引导目的状语从句）；D.好像（引导方式状语从句）。
根据句意可知，译为“只要他们好”，引导条件状语从句，故选A。
13．— What were you doing ______ I knocked at the door?— I was sleeping.A．unless B．onceC．when D．while【答案】C【解析】【详解】试题分析：句意：－我敲门时，你在做什么？－我在睡觉。
A．unless如果不，除非；引导条件状语从句；B．once一旦……，引导条件状语从句；C．when当……时，表示两个动作同时发生，主句一般使用过去时，从句使用过去进行时；D．while当……时，表示两个动作同时发生，后跟延续性动词，从句一般使用进行时态，表示一段时间。
本题表示“当……时”，knock是非延续性动词，故选C。
考点：考查连词辨析。
14．My family always go somewhere interesting the holiday begins.A．as soon as B．soC．so that D．even though【答案】A【解析】试题分析：句意：一放假，我们家总是去一些有趣的地方。
A. as soon as一……就……。
表示时间；B. so因此。
表示结果；C. so that 以便，为了，表示目的；D. even though尽管，即使，表示条件。
假期开始，指时间，用as soon as：一放假就去参观有趣的地方。
故选A。
考点：考查连词辨析。
15．— Do you think Jack will catch up with us?— I believe so._______ he loses himself in computer games.A．If B．Unless C．Or D．But【答案】B【解析】【详解】句意：—你认为杰克会赶上我们吗? —我认为会，除非他沉迷于电脑游戏。
A. If如果；B. Unless除非；C. Or否则；D. But但是。
根据本题语境，可知，回答为如果他不沉迷于电脑游戏，他就能赶上我们，如果不，即为除非。
故选B。
16．You will lose the ability to pay attention, plan and stay active after one or two nights _____ you can sleep well.A．until B．when C．unless D．if【答案】C【解析】【详解】句意：除非你能睡好，否则一两个晚上之后你会失去关注、计划和保持活力的能力。