初三英语时态练习题(含答案)[1]

时态练习题一、用所给词的适当形式填空1．He______swimming in the river every day in summer. (go)2.It________you are right. ( seem )3.Look, the children______ basketball on the playground. ( play )4.He______to the radio when I came in, ( listen )5.It is very cold .I think it______ . ( rain )6. —I need some paper . —I______ some for you .( bring )7.I can’t find my pen . Who______it ? ( take )8.He said that he______back in five minutes . ( come )9.I didn’t meet him. He______ when I got there. ( leave )10.I______my bike, so I have to walk to school. ( lose )11.He______down and began to read his newspaper. ( sit )12.He is very hungry. He_________ anything for three days. ( not eat )13.I______with you if I have time . ( go )14.We will go to the cinema if it______fine . (be )15.I will tell her the news when she______to see me next week. (come)16. “ When______you______the car ?” “ In 1998 . ”( buy )17.We______good friends since we met at school . （be）18.What______you______ at five yesterday afternoon ? (do)19.The bike is nice . How much______it______? (cost)二、选择最佳答案填空1.We’ll go swimming if the weather______fine Tomorrow.A. isB.wasC. will beD.is going to be2.It______five years since he has left for Beijing.A. wasB. has beenC.isD.is going to be3.Please don’t leave the office until yourfriend______back.A.cameesC.have comeD.will come4.By the end of last year he______about 1500 English words.A. learnsB.learnedC.was learningD.had learned5.Listen ! Someone______in the next room .A.criedB.cryingC.is cryingD.has cried6.You must tell him the news as soon as you______him.A.seeB.seesC.will seeD.is seeing7.He told me that he______to see us the next day.esB. cameC. will comeD. would come 8.We can’t find him anywhere . Perhaps he______home.A. is goingB. wentC. has comeD. would come9.The teacher told us that the sun______bigger than the earth.A. isB. wasC. has beenD.will be10.Could you tell me where the railway station______?11.A. was B. is C. will be D. would be11.We______to the Great Wall several times.12.A. go B. were going C. have gone D.have been 12.It seemed that the old man______for something over there.A. looks B. looked C. was looking D. has looked13.He was sure that he______his wallet in the office .A. leftB. would leaveC. had leftD. has left14.You must study hard if you______ want to fail the exam. A. won’t B. don’t C. haven’t D. hadn’t15. —I’m afraid you can’t sit here .—Sorry , I______know.A. don’tB. won’tC. can’tD. didn’t16. As she______the newspaper , Granny______asleep.A. read , was fallingB. FellC. was reading , was fallingD.read , fell17.—Jim is not coming tonight .—But he______ !A.promises（许诺）B. promisedC. will promiseD. had promised18.—What’s her name? —I______A. forgetB. forgotC. had forgottenD. am forgetting三、动词时态能力综合测试1.He often______his clothes on Sundays.A. washingB. washesC. has washedD. wash2.I’m Chinese. Where______from?A. do you comeB. you are comingC. you comeD. are you coming3.May______to school.A. never walksB. is never walkingC. walk neverD. never is walking4.We will start as soon as our teacher______ .A. comesB. will comeC. comeD. is coming5.How long ago______playing football?A. have you stoppedB. had you stoppedC. did you stopD. do you stop6.It______ hard when I left my house .A. is rainingB. rainsC. was rainingD. will rain7.I think this question______to answer.A. easyB. is easyC. was easyD. will easy8. Don’t talk so loudly . Your father______.A. sleepsB. is sleepingC. sleptD. had slept9.How many people does the doctor know who______of the disease (疾病)？A. are dyingB. is dyingC. has diedD. dies10.I______my homework now.A. finishB. finishedC. have finishedD. had finished11.He______for three years.A. has joinedB. has been in the armyC. joinedD. has served the army12.His grandfather______for thirty years.A. diedB. was deadC. has been deadD. has died13.I______ from my brother for a long time.A.not have heardB. have not heardC. have heard notD. do not hear14.Maths, one of the most important subjects,______always interested him。

A. hasB. haveC. areD. is15.—Did your brother go to America last year?—______.A. No , he did never go thereB. No , he has never gone hereC. No , he never was thereD. No , he’s never been there16.He______ that factory since 1958.A. has leftB. has worked inC. has gone fromD. has come to17.Our teacher______to Beijing three times.A. wentB. had goneC. has goneD. has beenst week John______his leg.A. felt and brokenB. fell and brokeC. feels and breaksD. fallen and broken19.Jack______his thick coat because it was snowing.A. puts onB. put onC. takes onD. took on20.He______the picture on the wall.A. hangedB. hungC. has hangedD. was hanged21.Next month______twenty five.A. has my sisterB. my sister will beC. my sister shall haveD. my sister is going to be22.You______her again in a few weeks.A. will seeB. have seenC. had seenD. have been seen23. By the end of last term we______English for two years.A. have studiedB. have been studiedC. would studiedD. had studied24.Mrs Brown______in New York for three years before she went to London.A. livedB. had livedC. has livedD. will live25.When we arrived , the dinner______.A. already beganB. has already begunC. had already begunD. was just begun26.I will go home for the holiday as soon as I______ my exams.A. will finishB. finishC. finishingD. finished27.When______, I’ll talk to him.A. does Peter comeB. Peter will comeC. Peter comesD. can Peter come28.My sister______to see me . She’ll be here soon.A. comesB. is comingC. had comeD. came29.They said they______our answer the next day .A. had heardB. would hear ofC. would hearD. will hear30.The old man said that light______faster than sound.A. wentB. will goC. travelsD. will travel基本型用所给动词的正确形式填空：1. A cow _______ (eat) grass but gives milk.(1999云南)2. The room is dirty. I _______ (clean) it in a minute.3. Mary __ (sing) three songs already. Let her have a rest.4. It is late at night. Dad ____ still ____ (work) at the desk.5. Tell Robert to turn off the lights before he ___(go) out.6. He put on his clothes and _______ (hurry) to school without breakfast.7. He _______ (fall) and _______ (hit) his leg on a table that day.8. She _____ _____ (be) there twice already.9. What time ______ Jim ______ (get) up every day.10. Look! Tom ________ (mend) the car over there.You ______ ______ (not sweep) the floor yesterday.______ (hold) on a minute, please! I __ (look) for a piece of paper now.If you _______ (speak) too loudly in public places, other people ________ (not be) pleased.“The light in the classroom _______ (be) on.”“Oh, sorry, I forgot ________ (turn) it off.”“Hoe about all of us _______ (take) a short rest?”“Sorry, I feel like _______ (watch) TV after supper.”________ (not worry). He’ll come back soon. (1999昆明) ________ February usually ________ (have) 28 days? “I’ve _______ (have) another letter from him,” Mr. White said.“His leg’s ________ (get) worse. That’s too bad.”______ you ________ (wait) for a bus now?(1999宁夏) We ________ (not go) climbing the hills if it rains tomorrow.提高型1. “I’ve finished my homework.” “When ____ you _____ it?”A. have; finishedB. do; finishC. did; finishD. will; finish2. Judy _____ the Great Wall twice, and now she still_____ to go there.(河北)A. went to; wantedB. goes to; wantsC. has gone to; wantsD. has been to; wants3. They usually _____ TV in the evening. (1999北京)A. watchB. will watchC. are watchingD. watches4. The child _____ crying when he saw his mother.(1999吉林)A. stopB. stopsC. stoppedD. stopping5. What were the twins talking about when you _____ them?A. had seenB. were seeingC. sawD. see6. Please buy some stamps for me if you _____ the post office.A. passB. will passC. have passedD. passed7. –Where is Jim?-He ____ to the library.A. wentB. has beenC. goesD. has gone8. Kate ____ to bed until her father returned yesterday evening.A. won’t goB. doesn’t goC. wentD. didn’t go9. “Have you ever been to Shanghai?” “Yes, I ____ there last year.”A. wentB. goC. wereD. gone10. The two old men ____ each other since 1970. (1999河南)A. didn’t seenB. don’t seeC. haven’t seeD. won’t see11. She says that she ____ to Beijing next week.(1999武汉)A. has goneB. will goC. goes12. I’ll go for a walk with you if it _____ tomorrow. (1999广东)A. won’t rainB. doesn’t raiC. will rain 13. I ____ her to bring my book to school yesterday.(1999天津)A. toldB. tellC. am tellinD. have toldBe quite. The child ____.(1998广东)A. sleepsB. sleptC. is sleepingI don’t know if he ____ tomorrow. If he _____, I’ll meet him.A. will come; comesB. comes; comesC. will come; will comeD. comes; will comeI ____ an old friend of mine when I ____ in the street yesterday afternoon.A. met; was walkingB. was meeting; walkedC. was meeting; was walkingD. met; walked–Is Mr. Wang at home?-No, he isn’t. he ____to Nanjing.A. wentB. goesC. goingD. has gone–Have you mended the motorbike, Tom?-Yes, I ____ it ten minutes ago.A. haveB. hadC.mendedD. have mendedIf it is fine, the sports meeting ____ two days. (1998天津) A. lastsB. will lastC. lastedD. lastOur geography teacher told us that the earth ____ around the sun.A. goesB. goC. wentD. going综合型1. By the end of last term, we ____ 1000 English words. (1996河南)A. have learnedB. has learntC. had learnedD. learned2. The Reads ____ lunch when I got to their house.(1997南京)A. were havingB. was havingC. are havingD. is having3. His family ____ TV from 10 to 12 last night.A. watchedB. were watchingC. had watchedD. was watching4. “Have you ever ____ to the USA?” “Yes, I ____ there last summer.”A. gone; wentB. gone; have beenC. been; wentD. been; have5. He ____ his homework and now is listening to music.A. finishedB. finishesC. has finisheD. finish6. We’ve waited for you 2 hours. Where _____, Jim?A. are youB. have you beeC. are you fromD. have you gone7. He’s out. He ____ to the library.A. wentB. has goneC. has beenD. had gone8. “How long have you ____ there?” “About six years.”A. comeB. goneC. leftD. worked9. Our workshop ____ since two years ago.A. was openedB. openedC. has been openD. has opened10. My grandpa _____ for half a year.A. has been deadB. diedC. has dieD. was dead“When ____ the Greens ____ back to China?” “Nextmo nth”.A. did; comeB. are; comeC. will; comeD. have; come Stay inside, please. It ____ hard right now.A. is rainingB. has rainedC. rainsD. was rainingOur knowledge of the universe _____ all the time.A. growB. is growingC. growsD. grewLook! Lily with her sisters _____ a kite on the playground.A. is flyingB. flyingC. are flyingD. flyIt’s five years since I ____ you last time.A. metB. meetC. have metD. had metI thought the news ____ important for us all.A. isB. wasC. wereD. will beThe woman fell off the bike and _____ on the road.A. liedB. lieC. layD. lyingGranny Wang told the children that the sun _____ from the east.A. has risenB. roseC. risesD. raiseGo to help her if she _____ in trouble.A. is goingB. will beC. comesD. isDo you know which picture _____ best?A. does she likeB. she likesC. did she likeD. she is likingThe Whites _____ many places of interest since they came to China.A. have visitedB. will visiC. visitedD. visitI don’t know if she ____ me when she ____.(2000黑龙江)A. tells; arrivesB. tells; will arriveC. will tell; will arriveD. will tell; arrivesNever trouble me while I ____ in my room!(2000河北) A. will sleepB. asleepC. am sleepingD. sleptIf you ____ lunch at school today, so will I.(2000湖北黄冈)A. haveB. have hadC. will haveD. had–You’re smoking a lot.Only at home. No one ____ me but you. Lucy is studying in Beijing. She ____ London for one year.A. has leftB. gas left forC. has been away fromD. has been awayThey never knew what _____ to the world in a hundred years.A. happenedB. would happenC. had happenedD. would be happene26( ) 1 When Miss Zhao came into the classroom, the students___.A. talkedB. were talkingC. talkingD. talk( ) 2 When Mary came to see me, I___ the music.A. am listening toB. listened toC. was listening toD. was listening( ) 3 When I arrived there, you___volleyball.A. has already playedB. playedC. were playingD. would play( ) 4 When I knocked at the door, my mother___.A. cookedB. cookingC. was cookingD. cook( ) 5 We heard a cry when we ___ TV last night.A. were watchingB. would watchC. watchD. watched27( ) 1 Mary was drawing a horse on the blackboard when I ___ in.A. have comeB. cameC. am comingD. come( ) 2 The little boy ___ when I came into the room.A. is drawingB. drawsC. has drawnD. was drawing ( ) 3 I ___ the floor when my father came in.A. was sweepingB. sweptC. sweepingD. am sweeping ( ) 4 They ___ a meeting when I saw them.A. hadB. have hadC. were havingD. are having( ) 5 -What ___ when I phoned you this morning?-I ___ my homework and was starting to take a bath.A. were you doing; had just finishedB. would you do; have just finishedC. are you doing; just finishedD. did you do; just finished28( ) 1 Look at the clouds. ___.A. It's going to rainB. It'll be rainingC. It will be rainedD. If 11 rain I( ) 2 Myfamily____to stay in London for some time.A. is goingB. are goingC. goD. are go( ) 3 There___ two English films next week.A. is going to beB. are going to haveC. will haveD. are going to be( ) 4 There is going to___ a volleyball match on our school playground. The match is going to___ at six this evening.A. have; beB. be; haveC. be; beD. have; have29( ) 1 -Are you busy this afternoon?-No. I___to watch a football match.A. am goingB. willC. shallD. can( ) 2 Who ___ help him to move the box away?A. areB. are going ,C. are going toD. is( ) 3 Where ____ buy a computer for your son?A. you areB. are goingC. you goD. are you going to30( ) 1 It is getting dark. I___.A. must be leavingB. must be leftC. will leavingD. was leaving( ) 2 Tell me who_,__ to our party tomorrow.A. is comingB. was comingC. comeD. have come ( ) 3 Whom ___ you ___ to for help now?A. are; turningB. are; turnC. would; turnD. do; turning31( ) 1 Next year my little sister ____ ten years old.A. is to beB. is going to beC. shall beD. will be ( ) 2 They have just decided that they ___ the job.A. have takenB. will takeC. would takeD. are taking ( ) 3 She says that she___to Beijing next week.A. has goneB. will goC. goesD. go( ) 4 If he___at eight, we___, too.A. leave; doB. leaves; willC. will leave; willD. is leaving; are( ) 5 -Is this the last exam for this term?-Yes, but there___ another test three months from now.A. isB. wasC. will beD. has been( ) 6 You___ late for school again if you___ early.A. shall be; won't get upB. are; won't get upC. will be; don't get upD. have been; not get32( ) 1 Will you please ___ this rubber to Xiao Ling?A. to giveB. givingC. gaveD. give( ) 2 -____ I ____ the window?-Yes, please.A. Will; cleanB. Am; cleaningC. Do; cleanD. Shall; clean( ) 3 ___ you like to have dinner with us tonight?A. WouldB. DoC. AreD. Will33( ) 1 -I'm sorry, I forgot to past the card for you. -Never mind, I ___ post it tomorrow.A. am goingB. am going toC. will goD. go( ) 2 ___ you ___ a teacher when you grow up?A. Will; beB. Are; going to beC. Are; /D. Will; going to be,34( ) 1 I thought Class One ___ in the match.A. will winB. would winC. is going to winD. was going to win( ) 2 She didn't tell me whether she ___ back early or late.A. comesB. will comeC. is comingD. would come ( ) 3 The students were told that they____ at the school gate at 2: 00 the following afternoon.A. metB. will meetC. were to meetD. were met35( ) 1 Last year the old man___ under the roof, enjoying the sunlight-A. sitsB. is sittingC. sitD. would sit( ) 2 We___ each other when we studied together.A. helpingB. are helpingC. would helpD. do help ( ) 3 Though we pushed the car hard, the car___ away. A. wouldn't move B. movedC. would moveD. doesn't move36( ) 1 ______ you ___ the novel that I lent you last week?A. Did; finishB. Have; finishedC. Are; finishedD. Do; finish( ) 2 He ___ in our school for 20 years and he ___ here in 1977.A. has taught; cameB. has taught; has comeC. taught; cameD. has teached; has came( ) 3 They are late. The film ___ for five minutes.A. has begunB. has startedC. has been onD. began37( ) 1 A new school ___ in my hometown recently.A. is set upB. has been set upC. was set upD. has set up( ) 2 -Did your brother go to America last year?A. No he did never go thereB. No, he has never gone thereC. No, he never was thereD. No, he's never been there ( ) 3 _____ the Great Wall?A. Have you ever gone toB. Are you ever going toC. Do you ever go toD. Have you ever been to( ) 4.I___ the book yet.A. haven't readB. hadn't readC. don't readD. am not reading( ) 5 They left for Beijing last month and we ___ them ever since.A. don't hear fromB. haven't heard fromC. won't hear fromD. didn't hear from( ) 6 He says he___ the book several times already this year.A. had readB. has readC. will readD. is reading38( ) 1 He ___ the book a week ago, but I ___ it to the library.A. have lent; returnedB. have borrowed; returnC. borrowed; have returnedD. lent; have returned( ) 2 You can't use the computer. It___.A. was broken downB. is wrongC. is badD. has broken down( ) 3 I'm sorry, I____your name.A. have forgottenB. forgotC. had forgottenD. forgotten39( ) 1 The old man ___ in this house since 1949.A. has livedB. had livedC. is livingD. lives( ) 2 I hope I ___ no mistake in my work so farA. makeB. am makingC. have madeD. was making ( ) 3 The life of the people___ greatly in the past years. A. has changed B. have changedC. changedD. are changing( ) 4 Her grandpa___ for three years.A. has been deadB. has diedC. had been deadD. died40( ) 1 I ___ her only twice since last year.A. seeB. was seeingC. have seenD. saw( ) 2 Lucy ___ to Shanghai once.118 It's a Haidian top problemA. wentB. has goneC. has beenD. had been( ) 3 Judy___the Great Wall twice, and now she still ___to go there.A. went to; wantedB. goes to; wantsC. has gone to; wantsD. has been to; wants( ) 4 In the past five years. I___ English words.A. have learned three thousandB. learned three thousand ofC. had learned three thousandsD. learned thousands of ( ) 5 He ___ there many times.A. has beenB. wentC. has been toD. has gone41( ) 1 -- you ___ your breakfast?-Yes, I have.-When ___ you ___ it? -Twenty minutes ago.A. Have; have; have; hadB. Did; have; did; haveC. Have; had; do; haveD. Have; had; did; have( ) 2 -___ your homework yet?-Not yet, I___it.A. Have you done; am doingB. Did you do; didC. Did you do; am doingD. Have you done; did( ) 3 -Where___ the recorder? I can't see it anywhere.-I ___ it right here half an hour ago. But now it is gone.A. did you put; have putB. have you put; putC. do you put; puttingD. did you put; have put42( ) 1 Mr Green ___ China for three years.A. has been toB. has come toC. has been inD. has arrived in( ) 2 Tom ___ London for two years.A. had leftB. has gone awayC. has been away fromD. had been away from( ) 3 How long ___ a Party member?A. have you beenB. are youC. have you becomeD. did you become43( ) 1 My father isn't here now. He ___Shanghai. He ___ there twice.A. has gone; has beenB. has gone to; has been toC. has been to; has goneD. has gone to; has been ( ) 2 -Hi! Bruce. I have't seen you for three weeks.-Hi! George. I___America.A. have gone toB. went to -C. have been toD. have been in( ) 3 My uncle___ London for five years. But he will be back next year.A. wentB. has been inC. has goneD. has gone to ( ) 4 -Could I speak to Mrs Black, please?-Sorry, she ___ to the library.A. is goingB. has goneC. has beenD. will to( ) 5 Peter is young, but he___ many foreign countries.A. has been inB. has gone toC. went toD. has been to44( ) 1 ____ you ____ the book?A. Are; haveB. Have; gotC. Do; getD. Are; having ( ) 2 ____ you ____ to know about the news?A. Do; mustB. Will; getC. Have; hadD. Do; have ( ) 3 They___ finish the job by tomorrow.A. have gotB. have got toC. got toD. have45( ) 1 Before we got to the railway station, the train___already.A. went outB. had goneC. has goneD. has arrived ( ) 2 The film ___ when I ___ to the cinema.A. has begun; getB. had begun; gotC. has been on; getD. had been on; got( ) 3 The meeting____ for five minutes when I got there. A. had begun B. had been on C. has begun D. has been on ( ) 4 -Let's hurry. The President is coming.-Oh, I was afraid that we___.A. already miss himB. had already missed himC. will miss him alreadyD. have already missed him ( ) 5 When I___ to the cinema, the film___ for 5 minutes.A. got; had begunB. get; will beginC. got; had been onD. got; has been on( ) 6 By the end of last term, we___over two thousand new words.A. learnedB. have learnedC. will learnD. had learned参考答案：1. 1-6 B C A C B D2. 1-3 B B C3. 1-3 C B B4. 1-3 B BD 5. 1-3 B C B 6. 1-7 A D C A A B B 7. 1-3 A C A8. 1-3 D B B9. 1-6 C B C A C A 10. 1-5 B C B A A11. 1-4 A B C B 12. 1-4 A D A B 13. 1-3 B B B 14. 1-3 B C C 15. 1-3 B A C 16. 1-3 D A A 17. 1-5 C B C A D18. 1-2 B B 19.1-3 B B C 20. 1-3 B C B 21. 1-5 A B A D A22. 1-4 C C B C 23. 1-3 A A B24. 1-3 C C B 25. 1-3 C A D26. 1-5 B C C C A27. 1-5 B D A C A28. 1-4 A B D C29. 1-3 A C D30. 1-3 A A A31. 1-6 D B B B C C32. 1-3 D D A33. 1-2 CB34. 1-3 B D C35. 1-3 D C A36. 1-3 B A C37. 1-6 B D D A B B38. 1-3 C D A39. 1-4 A C A A40. 1-5 C C D A A41. 1-3 D A B42. 1-3 C C A43. 1-5 D C D B D44. 1-3 C DB45. 1-6 B B B B C D41. When they______ through the forest, a bear_____ at them.A. walked… was comingB. were walking… cameC. were talking… comesD. walk… is coming42. A young man _____ her while she _____ her work .A. watched… was finishingB. was watching… finishedC. watched… finishedD. was watching… was finishing43. While mother _____ some washing, I ______a kite for Kack.A. did… madeB. was doing… madeC. was doing… was makingD. did… was making44. I _____ myself French from 7 to 9 yesterday morning. I _____ to work.A. was teaching… didn't goB. taught… didn't goC. was teaching… wentD. taught… went45. He _____ a model plane when I came to see him. A. makes B. is making C. was making D. made46. I ______ a letter at nine last night. A. is writing B. was writing C. wrote D. is writing47. The teacher_____ (give) us a history lesson when Tom walked into theclassroom. A. gave B. is giving C. was given D. was giving48. There will be a football match in two days, that is _______. A. last Sunday B. next Sunday C. every Sunday D. this Sunday49. We ______ class meeting this November. A. had B. have C. will have D. are having50. He ______ in his garden every morning next year. A. will work B. works C. worked D. is working51. Be careful. The train ______.A. will come B.C. comesD. is coming52. Look at those clouds. It _____ soon, I'm afraid. A. is going to rain B. is raining C. will rain D. won't rain53. The radio says it ______ the day after tomorrow. A. is going to snow B. is snowing C. will snow D. snows54. _____ he _____ some shopping tomorrow afternoon ? A. Will…does B. is going to do C. is…doing D. Shall… do55. What day _____ it ______ tomorrow ? Wednesday.A. is… going to be B. will…be C. shall…be D. does…be56. The boy _______ sixteen years old next year.A. is going to be B. is growing to be C. will be D. is57. _____ you ____ me up at six, please ?A. Are…going to wakeB. Are…wakingC. Will…wakeD. Do…wake58. If he ______ to college, he _____ a lot more.A. will go…will learnB. will go…is going to learnC. is going… is going to learnD. goes… will learn59. When she _____ next time ,l ______ her everything.A. is going to come…shall tellB. will come…shalltell C. comes…will tell D. come…will tell60. What day ____ it ____ tomorrow ? It____Tuesday.A. is…going to be… isB. will…be…willC. is…going to be…is goingD. willbe…will be参考答案：41-45 BDCAC 46—50 BDDCA 51—55 DACBB 56—60 CCDCD参考答案一、1. goes 2. seems 3. are playing 4. was listening5. is raining6. will bring7. took8. would come9. has left 10.lost 11. sat 12. hasn't eaten 13. will go 14. is 15. comes 16. did buy 17. have been 18. were doing 19. does cost 二、1. A2. B3. B4. D5. C6. A7. D8.C 9. A 10. B11. D 12. C 13. C 14. B 15. A 16.A 17.B18.A 三、1. B 2. A 3. A 4. A 5. C 6.C 7. B 8. C 9. A 10. C 11. B 12. C 13. B14. D 15. D 16. B 17. D 18. A 19. B 20. A 21. B 22.A 23. B 24. B 25. C 26. B 27. C 28. B 29. C 30. C。