2020版学案导学英语(人教版)必修1第一部分 必修一 Unit 4

Unit 4Earthquakes
Ⅰ.单词默写
1．I got a rescue(营救；援救) call from a woman in Muttontown.(2017·全国卷Ⅰ) 2．Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped(陷入困境)in powerless high－rise buildings.(2016·北京卷)
3．She encouraged a sense of community by creating shelters(避身处)and promoting education and services for people in need.(2016·全国卷Ⅰ)
4．The cars that drove the American Dream have helped to create a global ecological disaster(灾难)．In America the demand for oil has grown by 22 percent since 1990. 5．With so many people buried(掩埋) under the mine，none of the rescue workers would stop to have a rest.
6．A water pipe burst(爆裂) and the entire apartment was flooded.
7．The public was shocked(震惊) by an incident in which a man lifted a baby girl and threw her to the ground.
8．His house was completely destroyed(破坏) in the earthquake.
9．Too much drinking will do damage(伤害) to your health; you should take the doctor’s advice.
10．At last we could see the outline(轮廓) of an island.
Ⅱ.词性转换
1．He went through a lot of sufferings(suffer) before new China was founded. 2．Don’t forget to praise them sincerely(sincere) when someone does something good. 3．Her family was extremely(extreme) poor and all she had was one pair of shoes. 4．Therefore，China has taken on a national(nation)campaign to prevent the environment from being bad to worse.
5．Besides，she usually throws rubbish everywhere，which makes our room a
dirty(dirt)place.
6．The girl was almost frightened to death when she saw the frightening scene.(frighten)
7．In the crash he was seriously injured．He suffered severe injuries to the head and arms.(injure)
8．He expressed his thanks to us，with a thankful expression on his face.(express) 9．He sent me an e－mail of congratulation，congratulating me on the good result I had gained.(congratulate)
Ⅲ.短语填空
1．—We need an immediate reply.
—I see.I’ll send the paper to you right__away(立刻；马上)．
2．The whole country lay in__ruins(严重受损；破败不堪)after the war.
3．I was__trapped__in(陷入)the heavy rain on the way to school yesterday. 4．When I came in，he was__buried__in(埋头于)playing computer games.
5．It is reported that a__great__number__of(许多；大量的)people were injured in that accident and the number of people who died has reached 130.
6．My holiday is at__an__end(结束；终结)and I must go back to work tomorrow. 7．I didn’t persuade them to do the experiment in that way; you know，they thought__little/nothing__of(以为……没什么了不起)my suggestion.
8．Judging__from(从……判断)his look，he doesn’t think much of our plan. 9．San Francisco lay in ruins even though rescuers managed to dig__out(掘出；发现) a great number of survivors.
10．You have every reason to__be__proud__of(以……自豪)your country and nation.
1．句型公式：as if引导状语从句
船上的一对年轻人吃着东西，高声地谈论着，好像这个世界上就有他们自己。

A young couple in a boat were eating，talking and laughing loudly as__if__they__were__the__only__people__in__the__world．
2．句型公式：leave＋宾语＋宾语补足语
曾经有人让我们决定是在公园里野餐还是去参观博物馆。

Once we were__left__to__decide whether to have a picnic in a park or go to a museum.(2015·浙江卷·写作)
3．句型公式：everywhere作连词
无论走到哪里，她都受到热烈欢迎。

Everywhere__she__goes，she receives a warm welcome.
4．句型公式：部分否定
喜欢体育运动的人并不都喜欢参加体育运动。

All who enjoy sporting events don’t__like__to__participate__in__them.
5．句型公式：be doing...when...
我正在写作业，这时电话响了。

I was__doing__my__homework__when the phone rang.
第一板块重点单词
1．burst (burst，burst)vi.爆裂；爆发n.突然破裂；爆发
高考必刷题练透
单句改错/语段填空/一句多译
①Last night the room was burst in but nothing was taken away.in→into
②A fire was burst out last night，and his house was in ruins.去掉第一个was
③With a burst of laughter，Wang Xifeng burst into the room，whose flattering(谄媚的)words made Mrs.Jia burst with joy.
④不管什么时候回忆起这个有趣的故事，我都会忍不住笑起来。

④－1 Whenever I recall this funny story，I__ca n’t__help__bursting__out__laughing．④－2 No matter when I think of this funny story，I_can’t_help_bursting_into laughter．
状元笔记全记牢
(1)burst in/into闯入；突然破门而入
burst out突然迸发；爆发
⎭
⎪⎬⎪⎫burst out crying/laughing burst into tears/laughter 突然哭起来/笑起来 burst with anger/joy 勃然大怒/乐不可支
(2)a burst of 一阵……
【助记】
2．ruin n ．[U ]毁灭；毁坏；崩溃；[常用复数]废墟；遗迹vt .(使)毁坏；毁灭；成为废墟；使破产
高考必刷题练透
单句语法填空/单句改错
①Shortly after suffering from an earthquake and being reduced to ruins ，the city took on a new look. ②With time going on, the castle which once was very beautiful is now completely in ruins.
③Drunk driving not only ruined himself(him) but also killed several passers －by. ④It rained for two weeks on end ，completely ruined my holiday.ruined →ruining ⑤Many houses fell into ruins after the floods in the South China.ruins →ruin 状元笔记全记牢
(1)lie/be in ruins 成为废墟
fall into ruin 毁灭；灭亡；崩溃
be reduced to ruins 沦为废墟
(2)ruin oneself 毁掉自己；自取灭亡
ruin one ’s health/fame/future/pleasure 毁坏某人的健康/声誉/前途/好心情
3．injure vt .损害；伤害
高考必刷题练透
单句语法填空/单句改错/微写作
①These chemicals come from the injured(injure)parts of the plant and seem to be an alarm.(2017·全国卷Ⅱ) ②Luckily ，the injured was sent to the nearest hospital. was →were ③What the newspaper reported did great injury to her fame.did 后加a ④我的左脚受伤了，所以不能按计划和你一块去了。

(北京卷) Because_my_left_foot_was_injured ，I_cannot_go_with_you_as_planned. 状元笔记全记牢
(1)injured adj . 受伤的
the injured 伤员
(2)injury n . 伤；伤口；伤害
⎭⎪⎬⎪⎫do sb an injury do an injury to sb 伤害某人
【点津】the injured 作主语时，谓语动词常常使用复数形式。

4．trap vt .使陷入困境n .陷阱；困境
高考必刷题练透
单句语法填空/单句改错/句型转换
①He was__trapped(trap) in a traffic jam ，so he had to wait.
②The police trapped him into telling(tell)the truth.
③The farmer sets trap to catch the rats.
trap 前加a 或变为traps
④把上面句①改为用过去分词作状语
Trapped__in__a__traffic__jam ，he__had__to__wait.
状元笔记全记牢
(1)be trapped in 困在……中；陷在……中
trap sb into (doing) sth 诱使某人做某事
(2)set a trap/traps to do sth 设置陷阱做……
【联想】be trapped in的同义短语有：be locked in，be caught in，be stuck in等。

5．bury vt.掩埋；埋葬；使专心；使沉浸；隐藏
高考必刷题练透
单句语法填空/一句多译
①He stood on the sidewalk with his hands buried(bury) in the pockets.
②He sank down on the ground，burying(bury) his face in his hands.
③由于他埋头于书本，所以不知道外面下雨了。

③－1 Because he buried__himself__in his books，he didn’t know it was raining outside.
③－2 Because he was__buried__in his books，he didn’t know it was raining outside.
③－3 Burying__himself__in his books，he didn’t know it was raining outside.
③－4 Buried__in his books，he didn’t know it was raining outside.
状元笔记全记牢
bury...in...把……埋到……里；使……沉浸于……
bury oneself in 埋头于；专心于；沉浸于
be buried in 埋头于；专心于；沉浸于
【联想】表示“专心于；致力于”的其他常见短语：
①be devoted to②be lost/engaged/absorbed in③focus/concentrate on
④fix/concentrate one’s attention on
6．judge vt.断定；判断；判决n.裁判员；法官；评判员
高考必刷题练透
单句语法填空/完成句子
①If he had played a part in the film，he would have__been__judged(judge) to be the best actor.
②Judging(judge) from the above story，we can draw the conclusion that we shouldn’t judge a book by/from its cover.
③As_far_as_I_can_judge，it is wrong for them to let some students carry mobile phones.
我认为，他们让某些学生带手机是错误的。

状元笔记全记牢
judge...from/by...从……来判断
judge between right and wrong 判断是非
as far as I can judge 据我判断；我认为
【点津】judging from/by表示“从……来看；根据……来判断”，用在句首时为一个独立成分，不受句子主语和时态的影响。

第二板块核心短语
1．at an end结束；终结
高考必刷题练透
单句语法填空/微写作
①The meeting was nearly at an end when I got to the meeting room.
②At first he refused to accept any responsibility but he ended up apologizing (apologize)．
③I will_have_completed(complete) all of the readings by the end of this term if my plan goes well.
④顺便一提，我现在是第13届全国运动会的志愿者，它将于8月底在天津开幕。

(2017·天津卷)
By the way，I am now a volunteer for the 13th National Games，which will_be_held_at_the_end_of_August_in_Tianjin．
状元笔记全记牢
(1)at the end of 在……尽头/末端
in the end 最后，终于
by the end of 到……时候为止(常与完成时连用)
put/bring...to an end(＝put an end to...) 使……结束
come to an end 完成；结束
(2)end up with 以……结束(接表示方式的名词)
end up doing 以做某事结束
end up in 以……告终；结果为……(接表示结果的名词)
2．a (great) number of许多；大量的
高考必刷题练透
单句语法填空/选词填空(a number of/the number of)
①—A number of students are(be) in the dining hall now.
—Yes.The number of the students is(be) about 400.
②Now a__number__of college graduates are seeking to get a high－paid job.But the__number__of posts available for them is often not enough.
状元笔记全记牢
(1)a number of意为“若干；许多”；后接名词复数。

用作主语时，谓语动词一般用复数形式。

(2)the number of意为“……的数量”，其后接名词的复数或具有复数意义的名词。

用作主语时，谓语一般要用单数形式。

第三板块经典句式
1．It seemed as__if the world was at an end！仿佛到了世界末日！
高考必刷题练透
(1)单句语法填空/句型转换
①When a pencil is partly put into water，it looks as if it were (be)broken.
②Jack wasn’t saying anythin g，but the teacher smiled at him as if he had__done(do) something very clever.
③He opened his mouth as if to__say(say) something.
④The tennis player was lying on the floor as if she was hurt badly.(用非谓语动词改写)
→The tennis player was lying on the floor as if hurt badly.
(2)单句改错/微写作
⑤He opened his mouth as if he will say something.
will→would
⑥He talked about Rome as if that he had been there before.去掉that
⑦在回答问题的时候，我同桌看起来很紧张。

(It seemed as if...)
It_seemed_as_if_my_deskmate_was_very_nervous_when_he_answered_the_question .
状元笔记全记牢
(1)It seems/seemed (to sb) as if...意为“(对某人来说)似乎……”；as if 在句中引导表语从句。

(2)as if除了引导表语从句，也可引导状语从句；
(3)as if从句中可使用虚拟语气：
①与现在事实相反，谓语动词用一般过去时；
②与过去事实相反，谓语动词用“had＋过去分词”；
③与将来事实相反，谓语动词用“would/could/might＋动词原形”。

【点津】as if/though从句可用省略形式，后面直接跟名词、介词短语、形容词、不定式或分词。

2.All hope was not lost.不是所有的希望都破灭了。

高考必刷题练透
(1)句型转换(把下列部分否定的句子改为全部否定句)
①I do not remember all the details.
→I__remember__none__of__the__details.
②Both of them are not my brothers.
→Neither__of__them__is__my__brother.
③Not everything she did pleased him.
→Nothing__she__did__pleased__him.
④She is not always excited.
→She__is__never__excited.
(2)单句改错/一句多译
⑤I agree with most of what you said，but I don’t agree with anything.
anything→everything
⑥不是所有的人都愿意帮助他人。

⑥－1 All__people__are__not__willing__to__help__others.(all...not)
⑥－2 Not__all__people__are__willing__to__help__others.(not...all)
状元笔记全记牢
(1)all...not...(＝not all...)意为“并非所有的……都……”；是表示部分否定的句型之一。

(2)英语中的all，both，each，every，everybody，everything，completely，always，whole，entirely 等具有总括意义的代词、形容词和副词与否定词not连用，无论not位置如何，均构成部分否定，表示“并非都”的意思。

(3)no，none，never，nobody，neither，nothing，no more，no longer，either...not...等表示否定意义的词与谓语一起使用构成全部否定。

Ⅰ.课文短文改错
All hope was not lost.Soon after the quakes the army sent 150，000 soldiers to Tangshan to helping the rescue workers.Hundreds of thousands people were helped.The army organized teams to dig out those that were trapped and to bury the dead.To the north of the city，most of the 10，000 miners are rescued from the coal mines here.Workers built shelters to survivors whose home had been destroyed.Fresh water was taken to the city by the train，truck and plane.Slow，the city began to breath again.
答案
All hope was not lost.Soon after the quakes the army sent 150，000 soldiers to
Tangshan to helping
help the rescue workers.Hundreds of thousands of
people were
helped.The army organized teams to dig out those that
who were trapped and to bury the
dead.To the north of the city，most of the 10，000 miners
are
were rescued from the coal
mines here
there.Workers built shelters
to
for survivors whose
home
homes had been
destroyed.Fresh water was taken to the city by the train，truck and plane.
Slow Slowly，the
city began to breath breathe again.
Ⅱ.单元要点微写作
假如你是China Daily的一名记者，负责报道某地一次强烈的地震情况。

请根据以下提示，用英语写一篇60词左右的短文。

1．夜里，一切都开始摇晃，世界似乎到了末日；
2．有人受伤，有人被埋在废墟下；
3．很快士兵被派遣到那里，运来了食品和饮用水；
4．全城又恢复了生机。

注意：1.尽量多地使用本单元的知识点；
2．可适当增加细节。

【参考范文】
One night，everything began to shake，with the pipes bursting and the electricity cut off.It seemed as if the world was at an end.Some people were injured；others were buried in the ruins.A number of trapped people waited for the rescue.All hope was not lost.The soldiers were soon sent there.Hundreds of thousands of people were helped out.Food and fresh water were taken to the city by plane，train and truck.Slowly，the city began to breathe again.
Ⅲ.写作句型锤炼
主体段落常用句型锤炼之二：非限制性定语从句
►先熟读背诵——精彩句型烂熟于心
1．Tang poetry，which wins great popularity with Chinese people as an important
literary form，is what we’re going to learn the next class.(2017·全国卷Ⅰ·书面表达) 唐诗作为一种重要的文学形式深受中国人喜爱，它也是我们下节课将要学的内容。

2．Paper－cutting is a traditional Chinese art with a long history, which is popular among many people.(2017·全国卷Ⅱ·书面表达)
剪纸是中国传统艺术，有着悠久的历史，深受许多人的喜爱。

3. During holiday seasons, I will live in the countryside, where air is fresh and people are friendly.(全国卷Ⅱ·满分作文)
在假期，我会住在乡下，那里空气新鲜、人们友好。

4. In addition, you should respect your teachers, who unselfishly help you to gain much knowledge.(江西卷·满分作文)
另外，你应该尊重那些无私帮助你获得很多知识的老师们。

►后临摹仿写——妙语佳句信手拈来
1．首先，节目的主题是环境保护，这在当今社会是非常重要的。

__First__of__all,__the__theme__of__the__show__is__environmental__protection,__ which__is__of__great__importance__in__today’s__society.(2016·全国卷Ⅱ·书面表达)
2．你看过那部电影吗？它的男主演可是世界闻名的。

Have__you__seen__the__film,__whose__leading__actor__is__world__famous? 3．他将把郊游推迟到5月1号，那时他将有空。

He__will__put__off__the__outing__until__May__1st,__when__he__will__be__free.
A
You probably laugh at something you find funny，but how much do you really know about jokes and humour？Reader’s Digest (RD) questioned several experts to give us some facts about them.
RD：What’s the oldest jok e in the world?
“We can’t know the oldest joke in the world because it would have existed earlier than writing.”says Christie Davies，professor of sociology at the University of Reading in the UK.The oldest joke book that’s been found so far is the Greek Philogelos.It dates from the 4th century AD，although the jokes date from an earlier time.According to psychologist Steve Wilson，director of National Humor Month(April in the US)，it contains 265 jokes.
RD：Do some people fail to develop a sense of humour?
Rod Martin，professor of psychology at the Western University in Canada，believes that while everyone is born without a sense of humour，as we develop，humour and laughter begin to appear.“Of course，some children are more serious，quiet，and less likely to laugh frequently，but this doesn’t mean they don’t have a sense of humour.”And according to Steve Wilson，there are no adults who don’t have a sense of humour.“Almost everyone is able to develop a sense of humour，and I teach people how，”he says.
RD：Do people share a sense of humour unique to their own nation?
Sense of humour does differ a lot by country，according to an author named Scott Weems.British humour is thought to be absurd(荒谬的)in nature，while American humour has an aggressive quality.According to a study，Germans are found to find everything funny.
【语篇导读】本文是应用文。

文章通过访谈为读者传递了一些有关笑话和幽默的知识。

1．What do we know about the oldest joke book?
A．It remains unknown.
B．It was written in Greek.
C．It was found in the UK.
D．It contains the oldest joke.
答案B[细节理解题。

由第一个问题的回答中的The oldest joke book that’s been found so far is the Greek Philogelos可知，迄今为止发现的世界上最古老的笑话书
是希腊的Philogelos。

]
2．What does Rod Martin agree with about people’s sense of humour?
A．Nobody is born with a sense of humour.
B．Some adults lose it when they grow up.
C．Childhood is the best time to develop such ability.
D．Children have a poorer sense of humour than adults.
答案A[细节理解题。

由第二个问题的回答中的everyone is born without a sense of humour可知，没有人先天就具有幽默感。

]
3．What kind of humour has an aggressive feature?
A．British humour. B．German humour.
C．Canadian humour. D．American humour.
答案D[细节理解题。

由最后一个问题的回答中的American humour has an aggressive quality可知答案。

]
4．Where can you probably find the text?
A．In a popular magazine.
B．In a research paper.
C．In a personal diary.
D．In a textbook.
答案A[推理判断题。

根据第一段中的Reader’s Digest及文章的形式、内容可知，本文应选自畅销杂志。

]
B
The study findings about a new blood test have been published this morning in the Journal of the American Medical Association (JAMA Cardiology)．The study was conducted smoothly and effectively based on their working together between the Canterbury District Health Board (CDHB), New Zealand, and the Christchurch Heart Institute, which is run by the University of Otago, Christchurch, New Zealand.
Co－lead author, Associate Professor John Pickering of the University of Otago,
says，“When a patient comes to an emergency department (ED) with symptoms that suggest a potential heart attack, present laboratory blood－testing procedures can take 1—2 hours to discover the risk level, but with this new test we can get a result in just fifteen minutes，from the bedside, or ‘point－of－care’，freeing up ED and health care staff. The patient can then either be cleared to leave, or quickly progressed to specialist care. The result proves to be true after later observation and other tests.”
Senior author, and Director of Emergency Medicine Research, Dr Martin Than of the CDHB says present point－of－care tests can lack the precision of this new method that is centred around a measurement of cardiac troponin(肌钙蛋白) in the blood. “Our results have extremely exciting potential for not only EDs, but also remote health care providers—such as those in the countryside. Given the great effect heart disease and other related conditions have on not only New Zealand society but also the international community, we have something that could benefit tens of millions of patients globally，” Dr Than says.
The analysis of this observational study, conducted from 2016 to 2017 at Christchurch Hospital’s emergency department, included about 350 patie nts with symptoms of a heart attack. “So far our testing has shown that close to fifty percent of patients could have the heart attack safely and precisely excluded (排除……的可能性) soon after arrival at the ED. Wider study is required to be in progress and some other study concerned across ten District Health Boards in New Zealand is planned for next year，” Dr Than says.
【语篇导读】本文属于说明文，介绍了一种新的用来判断一个人是否患有心脏病的血液检测方法，该方法比传统的检测方法更快捷、更可靠，且能够节省人力。

5．How did the researchers get the findings?
A．By doing effective teamwork.
B．By observing patients with heart disease.
C．By applying the EDs’ advanced technology.
D．By receiving support from other specialists.
答案A[细节理解题。

根据第一段中的“The study was conducted smoothly and
effectively...Christchurch，New Zealand”信息可知，通过坎特伯雷地区卫生委员会和克赖斯特彻奇心脏研究所两个机构共同合作，这个研究进展顺利而且富有成效。

由此可知，这些研究结果是通过有效的团队合作得来的。

]
6．Which of the following can best describe the new blood test?
A．Convenient and cheap.
B．Quick but risky.
C．Convenient but expensive.
D．Quick and reliable.
答案D[细节理解题。

根据第二段中的“present laboratory...but with this new test we can get a result in just fifteen minutes”和“The result proves to be true after later observation and other tests”信息可知，这种新的通过血液检测人是否患有心脏病的方法比传统的方法要快得多，并且很可靠，故选D。

]
7．What problem does the present point－of－care method face?
A．It spends too much to get medical training.
B．It doesn’t have its own health care staff.
C．It can’t check patients’ blood accurately.
D．It needs money to buy medical equipment.
答案C[推理判断题。

根据第三段中的“present point－of－care tests can lack the precision of this new method that is centred around a measurement...blood”信息可推知，传统的检测方法无法精确地检测到人血液中的肌钙蛋白，而新的检测方法则可解决这个问题。

故选C。

]
8．What does Dr Than mean about the new test in the last paragraph?
A．It is being used globally.
B．It needs further research.
C．It can cure heart disease.
D．It’ll make progress next year.
答案B[推理判断题。

根据最后一段中Dr Than说的话，有近50%的病人来到急症室后很快就安全地、准确地排除了患心脏病的可能。

同时，他指出，更加广泛的研究已在进行之中，其他相关研究已经规划在来年进行。

由此推知，这个新的血液检测方法还需要进一步的研究。

]
C
This is Tornado and Severe Weather(龙卷风与恶劣天气)Awareness Week.It’s important to know what to do and where to go during severe weather.A Wisconsin couple says an early warning could have been the difference between life and death when a tornado hit last summer.
Larry and Rita Krznarich were camping in northern Wisconsin last year.The day started off nice，but took a turn for the worse in the evening.So they turned on their weather radio.
“I turned the radio on and there was a specific warning：A storm is about to hit the Turtle－Flambeau.Take cover immediately，”says Larry Krznarich.“I said to Rita，‘He ad for the table.I’m going to warn the neighbors.’”
Larry joined Rita under the picnic table and within minutes a tornado hit.A falling tree hit Larry and broke his leg bone，but without the warning the couple says things could have been worse.
“The tent，where we may have been if not for the weather radio，was completely covered by trees；all of our things were completely covered”，says Rita Krznarich.
With spring here，people are being reminded to plan for severe weather.That includes buying a weather radio.
“T he great thing about the weather radio is that it’s instantaneous．It’s directly from the weather service，so you’re getting information at exactly the same time they’re getting it，”says Tod Pritchard，Emergency Preparedness Coordinator.
Larry has recovered from his injuries and now the couple makes sure everyone they know has a weather radio.
“Ever since the storm，we’ve given weather radios as gifts to people.You can get them for $20 so there’s no excuse not to have one or a couple，”says Larry.
【语篇导读】本文是记叙文。

美国威斯康星州的一对夫妇由于及时收听到了电台的天气预报而躲过了一劫。

9．What happened to the Wisconsin couple?
A．They survived a violent storm.
B．They were attacked while camping.
C．They got seriously injured in a tornado.
D．They were saved from danger by their neighbors.
答案A[细节理解题。

根据第一段中的 A Wisconsin couple says an early warning could have been the difference between life and death when a tornado hit last summer以及下文讲述的故事可知，这对威斯康星州的夫妇在一场龙卷风中死里逃生。

]
10．The radio warned people to ________．
A．stay at home in the evening
B．avoid camping in the Turtle－Flambeau
C．watch out for falling trees
D．protect themselves from bad weather
答案D[细节理解题。

根据第三段中的I turned the radio on and there was a specific warning：A storm is about to hit the Turtle－Flambeau.Take cover immediately可知，电台提醒人们躲避风暴。

]
11．What does the underlined word“instantaneous”in the text mean?
A．Correct. B．Useful.
C．Immediate. D．Traditional.
答案C[词义猜测题。

根据该词后面的It’s directly from the weather service，so you’re getting information at exactly the same time they’re getting it可知，天气预报收音机发出的信息是即时的。

]
12．Wha t’s the main idea of the text?
A．We should protect the environment to avoid natural disasters.
B．A weather radio should be part of severe weather preparations.
C．The Tornado and Severe Weather Awareness Week is necessary.
D．We should make safety plans for severe weather before we travel.
答案B[主旨大意题。

根据文中描述一对夫妇在龙卷风来临前由于及时收听到天气预报而避免了较大的伤害以及风暴过后，这对夫妇开始确保身边的人都有一台这样的收音机可以收听天气预报可知，B项概括了文章主旨。

]。