最新情态动词考点+例题-全面解析1

一、初中英语情态动词

1．Rock music ______ sound popular with the young, but it's not the favor of the aged people.

A. must

B. need

C. should

D. may

【答案】 D

【解析】【分析】句意：摇滚音乐在年轻人中听起来受欢迎，但是它不受上了年龄的人的

赞同。must, 表示猜测时，指把握比较大的肯定猜测，肯定……；need需要；should,应该；may，表示把握比较小的肯定猜测，可能，也许。结合句意，故选D。

【点评】考查情态动词辨析，注意几个常见情态动词的意思和用法。

2．—How amazing this robot is!

—Wow, it has video cameras in its eyes, so it “see” and interact with people.

A. may

B. can

C. must

D. should

【答案】 B

【解析】【分析】句意：—这个机器人多么惊人啊！—哇，在它的眼睛里有摄像机，因此

它能看见和人打交道。A. may 可以，可能；表示许可，B. can 能；表示能力，C. must 必须；D. should应该；根据it has video cameras in its eyes,可知是有能力看见，故选B。

【点评】考查情态动词辨析。熟记情态动词的含义和用法。

3．Look at the sign! It says “No Smoking!” You ________ smoke here. It's dangerous.

A. mustn't

B. ought not to

C. needn't

D. don't have to

【答案】 A

【解析】【分析】句意：看这个标志！上面写道“禁止吸烟！“你不能抽烟。这是危险的。A.mustn't 禁止，不允许；B.ought not to不应该，不应当；C.needn't不必；D.don't have to

不必。根据“No Smoking!”可知此处禁止吸烟，故答案为A。

【点评】考查情态动词。掌握情态动词的意义和用法。

4．Teenagers allowed to drive .

A. should not be

B. should be not

C. not should be

【答案】A

【解析】【分析】句意：年轻人不应该被允许驾车。Should是情态动词，其否定表达一般

在在后面加副词not，故选A。

【点评】此题考查含有情态动词的被动语态的否定形式。平时注意记忆情态动词的记忆和

用法。

5．You be tired after walking for such a long time. Sit down and have a rest.

A. can

B. can't

C. mustn't

D. must

【答案】 D

【解析】【分析】句意：走了这么长时间你一定很累了。坐下休息一下吧。can能，能

够，can't不能，对事物进行否定推测；mustn't一定不是，禁止，must一定，对事物进行肯定推测，根据after walking for such a long time，可以肯定你一定很累，所以是进行肯定推测，情态动词使用must，故选D。

【点评】此题考查情态动词。弄清每个情态动词的使用规则，根据句意确定所使用的情态动词。

6．—Where is Mom now?

—I'm not sure. She _________ be in the kitchen.

A. shall

B. may

C. need

D. must

【答案】 B

【解析】【分析】句意：—妈妈现在在哪里？—我不确定，她也许在厨房。A. shall 将要； B. may 可以，可能； C. need 需要； D. must必须，一定；根据I'm not sure可知是不确定；故选B。

【点评】此题考查情态动词表推测的用法。

7．— Is this e-dictionary Jack's?

— No, it_______ his. His is much newer.

A. can't be

B. mustn't be

C. may be

D. should be

【答案】 A

【解析】【分析】句意：-这个电子字典是杰克的吗？--不可能是他的，他的更新些。must,can（could）,may（maight）可以表示猜测，must表示肯定猜测，用于肯定句，肯定……，一定……；can’t,表示否定猜测，肯定不……，另外can（could）,may（maight），表示可能性猜测，可能……。根据后文的依据，可知是否定猜测，故选A

8．—Who it be that is knocking at the door?

—It be father, but I'm not sure.

A. call; must

B. can; may

C. must; can

D. may; must

【答案】 B

【解析】【分析】句意：——敲门的人可能是谁呢？——他可能是父亲，但是我不确定。第一空，can可能，表猜测用语疑问句形式，may是表可能；第二空，根据后面的but I'm not sure，可知表示不确定的猜测，应填may，故选B。

【点评】此题考查情态动词辨析。先弄清每个情态动词的使用规则。根据上下文的联系确定情态动词的使用。

9．—I wonder if this smart phone is Mary's.—It _______ belong to her. _______ is totally different from this one.

A. mustn't; Her

B. can't; Her

C. can't; Hers

D. may; Hers 【答案】C

【解析】【分析】句意：――我想知道这个智能机是否是玛丽的。――不可能属于她，她的和这个完全不同。情态动词表示推测时，用must表示“一定”，用might, could表示“可能”，用can't表示“不可能”。从句意看，这手机与她的完全不同，故不可能是她的，前面用can't。形容词性的物主代词后一定有一个被修饰的名词，名词性的物主代词后没有被其修饰的词，本题后没有被修饰的词，用名词性的物主代词，“她的”：hers。故选C。

10．We don't allow taking magazines out, but you ____________ copy the article you need on the machine over there.

A. can

B. must

C. should

D. would

【答案】 A

【解析】【分析】句意：我们不允许把杂志带出去，但是你可以在那里抄下你需要的文章。can能，能够，可以；must必须；should应该；would将；此处表示可以，允许，故选A。

【点评】此题考查情态动词辨析。弄清每个情态动词的使用规则，根据上下文的联系确定所使用的情态动词。

11．The girl riding a horse there be Shirley. Her left leg was badly hurt in an accident yesterday.

A. needn't

B. may not

C. can't

D. mustn't

【答案】C

【解析】【分析】句意：那边骑马的女孩不可能是雪莉。她的左腿在昨天的事故中受了重伤。A.needn't不必；B. may not不可以；C. can't不可能，表示否定的推测；D. mustn't 不准，不允许，表示禁止。本题表示否定的推测，不可能：can't。故选C。

12．According to the law, traffic keep to the left in England.

A. may

B. must

C. need

D. can

【答案】 B

【解析】【分析】句意：根据法律规定，在英国车辆必须靠左形式。A.may可以，表示允许；B.must必须，表示要求；C.need需要，表示必要性；D.can能，表示能力。根据According to the law,可知法律的要求，应是必须的，应用must，故答案为B。

【点评】考查情态动词。掌握情态动词的常用法。

13．—He be in the classroom,I think.

—No, he be in the classroom. I saw him go home a minute ago.

A. can； may not

B. must； may not

C. may； mustn't

D. may； can't 【答案】 D

【解析】【分析】句意:——我认为他可能在教室里。——不，他肯定没有在教室里，我刚才看到他回家了。must,can（could）,may（might）可以表示猜测，must表示肯定猜测，用于肯定句，肯定……一定……；can't表示否定猜测，肯定不……，另外can（could）,may （might）,表示可能性猜测，可能……根据I think,可知把握较小，根据I saw him go home a minute ago.可知第二句把握大，故选D。

14．We __________ pay to get into the concert. It's free.

A. can't

B. mustn't

C. might not

D. don't have to

【答案】 D

【解析】【分析】句意：我们进入音乐会不必付钱。这是免费的。A.can"t 不可能； B. mustn"t 禁止； C.might not 可能不；D. don"t have to不必。根据It's free.可知音乐会是免费的，因此不必付钱。故选D。

15．—Must I clean the classroom now? —No, you_______.

A. mustn't

B. can't

C. needn't

【答案】 C

【解析】【分析】句意：--我必须现在把教室打扫干净吗？--不，你不必。must I do …?的否定回答是No, you needn't 或者 No , you don't have to 。根据是否定回答，故选C。

16． Look! The traffic light has turned red. We _____ stop our car.

A. can

B. can't

C. must

D. mustn't

【答案】 C

【解析】【分析】句意:看交通灯成了红灯。我们必须停车。turned灯成了红灯;stop sth停止某物A. can能; B. can't不能; C. must必须; D.mustn't千万别，一定不要。根据常识可知红灯停，这是必须的，故选C

17．— _______ you play tennis?

—Yes, and I'm a good player.

A. Can

B. May

C. Must

D. Should

【答案】 A

【解析】【分析】句意：——你会打网球吗？——会，我是一名优秀的网球员。Can能，表

示能力；may可以，表示允许；must必须，表示要求；should应该，表示建议；结合句意，此处表示能力，故用情态动词can，故选A。

【点评】此题考查情态动词的用法。

18．—Wow....another gift! What's in the box?

—I'm not sure. It be a pair of sports shoes.

A. must

B. may

C. will

【答案】 B

【解析】【分析】句意：——哇哦，另一个礼物！在盒子里面的是什么？——我不确定，它可能是一双运动鞋。A. must必须；B. may可能，表示没有把握的肯定推测；C. will将会。根据答语中的不确定可知这里应为可能，故答案为B。

【点评】考查情态动词。掌握情态动词may表示推测的用法。

19．This book _________ be Lucy's. Look! Her name is on it.

A. can

B. may

C. must

D. might

【答案】C

【解析】【分析】句意：这本书一定是露西的。看，她的名字在上面。A. can 能；B. may 可能，可以；C. must 必须，一定；D. might可能；根据Her name is on it.可知一定是她的，故选C。

【点评】考查情态动词。根据语境选出合适的情态动词，熟记情态动词的用法。

20．—I think we need to sit down and have a talk. —I agree more. Let's take the bench over there.

A. could

B. couldn't

C. should

D. shouldn't

【答案】B

【解析】【分析】试题分析:句意:一一我认为我们需要坐下来谈一谈。一一我完全同意。我们到那边凳子上坐。I could agree more我可以同意更多的，I couldn't agree 我不同意I couldn’t agree more.我完全同意I should agree more.应该同意更多，I shouldn't agree more我不应该同意更多.后句Let's take the bench over there.我们在那边的凳子上坐吧）可以推测出，我同意。故选B。

21．You are supposed to bow when you meet someone from Korea.

A. must

B. should

C. would

D. can

【答案】 B

【解析】【分析】句意：当你遇到来自韩国的人时，你应该鞠躬。A. must必须，强调主观上的愿望；B. should应该，表示责任与义务；C. would要，将要；D. can能，会，表示能力。Be supposed to 表示“应该”，故选B。

【点评】本题考查情态动词词义辨析，以及must、should、would、can四个情态动词的词

义和用法。

22．—Must I come before 6: 30 tomorrow?

—No. You______. There will be plenty of time.

A. mustn't

B. can't

C. couldn't

D. needn't

【答案】 D

【解析】【分析】句意：—明天我必须六点半前到吗？—不，你不必，将有足够的时间。Must是“必须”的意思，当其变为一般疑问句时，否定回答要用nee dn't“不必”；肯定回答用must“必须”，mustn't不是“不必”的意思，而是一种禁止，一定不能做的意思。故选D。【点评】本题考查情态动词的用法。熟记must问句的回答。

23．As middle school students, we follow the public rules wherever we go.

A. would

B. should

C. might

D. could

【答案】 B

【解析】【分析】句意：作为中学生，无论走到哪里我们应该遵守公共规章制度。would 将会，指将会发生的事情；should，应该，主要用于告诉某人应该做什么、给予忠告或加强语气。might，可能，事情发生的可能性；could，能，表示委婉语气；此处表示应该做的事情，故选B。

【点评】此题考查情态动词辨析。根据上下文的联系确定所使用的情态动词。

24．—I've bought all the food for the party tonight.

—Thank you. Then I _______ go to the supermarket.

A. can't

B. mustn't

C. shouldn't

D. needn't

【答案】 D

【解析】【分析】句意：－今天晚上我买好了所有晚会的食物。－谢谢你。那么我就不必去超市了。A. can't不能；B. mustn't不准，不允许，禁止；C. shouldn't不应该；D. needn't 不必。你买好了，我就不必去买了。故选D。

【点评】考查情态动词，表示不必要应使用need的形式，要牢记不同的情态动词的意思。

25．Harry's been driving all day—— he be tired.

A. need

B. can

C. shall

D. must

【答案】 D

【解析】【分析】句意：哈利已经开了一整天车了——他一定累了。根据句意可知，开了一整天车，所以推测他累是一定的。所以用情态动词must。故选D。

26．—Look! The man welcoming us at the school gate be our headmaster.

—No, it be him. He is having a meeting in the office now.

A. must; can't

B. must; mustn't

C. can't; mustn't

D. mustn't; can 【答案】 A

【解析】【分析】句意：——看，在学校门口欢迎我们的一定是我们的班主任。——不，不可能是他。现在他正在办公室开会。must一定，表示肯定推测；can't不可能，表示否定推测；mustn't禁止，不表示推测；can可能。根据He is having a meeting in the office now.可知班主任正在开会，所以不可能是班主任，所以第二个空用can't，根据no可知第一个人认为正在欢迎我们的一定是班主任，所以用must，故选A。

【点评】考查情态动词，注意平时识记，理解句意。

27．Could you please speak a little louder? I ______ hear you very well.

A. can't

B. mustn't

C. shouldn't

D. needn't

【答案】 A

【解析】【分析】句意：请你说大点声好吗？我不能很好地听到你说的话。can't不能；mustn't禁止；不允许；shouldn't不应该；needn't不需要。根据语境表示“不能够”。故答案为A。

【点评】考查情态动词的辨析。

28．—Must I practice the violin right now?

—No, you _____. You ______ do it later on.

A. mustn't; may

B. shouldn't; might

C. needn't; may

D. needn't; must

【答案】 C

【解析】【分析】句意：－我必须马上练习钢琴吗？－不，你不必。你可以等会儿练。mustn't：不准，不允许，禁止；shouldn't不应该；needn't不必；前句问“必须吗？”回答：不必：needn't；后句话“你可以等会儿练”，是表示许可的，may可以；must必须；might 可以。might为may的过去式，此处用现在，故选C。

【点评】本题考查情态动词的词义辨析。以及must、need、should、need、might、may几个词的词义和用法

29． ---- Could I invite my friends to a party?

---- Yes, of course you _ .

A. can

B. could

C. must

【答案】A

【解析】【分析】句意:----我可以邀请我的朋友们来参加晚会吗?----是的，当然可以。A.可以，行，表示许可;B.能，会，can的过去式;可以，表示请求许可;C.表示主观愿望;一定，表示对目前情况作的肯定推测。本题是许可请朋友参加晚会，用can，故A。

30．——Mum, the train is leaving in eight minutes. I go now.——Okay, Jim, call me when you get there.

A. may

B. must

C. can

【答案】B

【解析】【分析】句意:一妈妈，火车八分钟后出发，我现在必须走了。一好的，吉姆，到了给我电话。A.may可以，表示允许或请求许可;B. must必须，强调主观愿望;一定，表示肯定的推测。C. can能，表示主语所具备的能力。火车要出发了，我必须走了。表示必须:must，故选B。

31．— Where did you put your schoolbag?

— I can't remember. I attended a concert yesterday so it still be in the music hall.

A. can't

B. need

C. might

D. must

【答案】 C

【解析】【分析】句意：一一你把你的书包放在哪儿了?一一我记不得了，我昨天出席了一个音乐会，因此它可能还在音乐厅里。A.can't 不能，表示能力;不可能，表示否定的推测;B.need 需要，必须;C. might可能，表示推测，可以，表示许可;D.must必须;一定，表示肯定的推测。我记不得了，因此在音乐厅只是一个可能情况，故选C。

32．—Is that red schoolbag Mary's？

— It ____be hers. She hates that color.

A. may

B. must

C. can't

D. might

【答案】 C

【解析】【分析】句意：——那个红色的书包是Mary的吗？——不可能是她的。她讨厌那个颜色。A.可能；B.一定；C.不可能；D.可能。根据She hates that color她讨厌那种颜色，可知不可能是她的书包，用can't be表示否定的猜测，故答案选C。

【点评】考查情态动词，首先记住情态动词的词义，然后理解句意，选择正确答案。

33．—Could you please play tennis with me now?

—Sorry, I ________. I have to finish my homework first.

A. can't

B. couldn't

C. shouldn't

D. wouldn't

【答案】 A

【解析】【分析】句意：——请问，现在你能和我一起打网球吗？——对不起，我不能。我必须先完成作业。can't不可以，couldn't可能不，shouldn't不应该，wouldn't不愿意。根据Could you please……?表示请求，不同意，应说不可以，故答案选A。

【点评】考查情态动词，注意识记情态动词的用法和理解句意。

34．Jenny is only eight years old, but she cook.

A. may

B. must

C. should

D. can

【答案】 D

【解析】【分析】句意：珍妮只有八岁，但她会做饭。A：may 可能；B：must必须；C： should应该； D： can会，能。根据Jenny is only eight years old,和连词but，表示与

前句是转折关系，可知她能做饭，故选D。

【点评】考查情态动词辨析。理解情态动词词义和用法，根据语境选择正确的情态动词。

35．—Shall we take a car?

—No, we__________ . It's only five minutes' walk.

A. can't

B. mustn't

C. needn't

D. couldn't

【答案】 C

【解析】【分析】句意：——我们应该坐车吗？——不，我们没必要。仅仅5分钟步行。A.不可能；B.禁止；C.不需要，没必要；D.不可能。根据后句 It's only five minutes' walk.仅仅5分钟的步行，所以没必要坐车，故选C。

【点评】考查情态动词用法，注意平时识记，理解句意。

36．—Excuse me, is this the right way to Children's Park?

— Sorry, I'm not sure. But it __________ be.

A. might

B. must

C. need

D. can

【答案】 A

【解析】【分析】句意：——请问，这是去儿童公园的路吗？——对不起，我不确定。但它可能是。A可能，表示不肯定的推测；B必须，表示肯定的推测，语气强烈；C需要，D 能，表示能力；根据I'm not sure ，可知是不确定的的语气，即不肯定的推测，因此用might，故选A。

【点评】考查情态动词，注意情态动词表推测的用法。

37．—Life is becoming convenient with the Internet.

—That's true! Almost everything ______ be done online.

A. must

B. could

C. should

D. can't

【答案】 B

【解析】【分析】句意：——生活正随着网络变得方便。——那是真的。几乎所有的事情可以在网上完成。A必须，B可以，C将，D不能。根据 Life is becoming convenient with the Internet. 生活正随着网络变得方便，可知应该是很多事情可以在网上完成，故选B。

【点评】考查情态动词。注意理解和掌握情态动词的不同用法。

38．—Jason, the exam is coming, but I ______ stop playing computer games!

—For better grades, my friend, I'm afraid you'll have to.

A. can't

B. mustn't

C. needn't

D. shouldn't

【答案】 A

【解析】【分析】句意：——Jason，考试就要来了，但是我不能停止打电脑游戏！——为了更好的分数，我的朋友，恐怕你会不得不停止打电脑游戏。A. 不能；B. 禁止；C. 不必要；D. 不应该。根据 the exam is coming，可知是不能打电脑游戏，故选A。

【点评】考查情态动词的用法，根据语境选出合适的情态动词，确保句子通顺。

39．We _________wait until the traffic light turns green when we cross the road.

A. must

B. can

C. need

D. may

【答案】 A

【解析】【分析】句意:当穿过公路时，我们必须等到交通灯变绿。A. 必须，表示责任、义务，语气强烈;B.能，会，表示主语所具备的能力;C.需要;D.可以。为了生命安全，等到交通灯变绿再过公路是我们的责任和义务。故选A。

40．—Linda, will it rain this afternoon?

—It ______ rain. Who knows? The weather changes so quickly in spring.

A. may

B. must

C. will

D. can

【答案】 A

【解析】【分析】句意：——琳达，今天下午下雨吗？——可能下雨，谁知道？春天天气变幻无常。A.可能；B.必须；C.将要；D.能够。根据 The weather changes so quickly in spring. 可知可能下雨，故答案是A。

【点评】考查情态动词辨析，表示或然性的推测一般使用may。

41．Driving in rush hour ______ be very dangerous, so you ______ be too careful.

A. should; should

B. could; should

C. might; mustn't

D. can; can't

【答案】 D

【解析】【分析】句意：在高峰期开车可能很危险，因此你无论怎样小心也不算过分。should应该；can可能，表示推测；could可能，可以，表示推测；might可能，可能性不如can强；must一定，must't禁止，不准。根据常识可知，高峰期开车可能会很危险，故排除A；can't … too，再……也不为过，固定搭配，故选D。

【点评】考查情态动词的辨析。注意句子涉及固定搭配can't…too。

42．—Kate, it's midnight! Why stay up so late?

—I'd like to go to bed earlier, but the test paper be handed in tomorrow morning.

A. may

B. should

C. can

D. must

【答案】 D

【解析】【分析】句意：Kate，都半夜了，你为什么熬夜到这么晚？我想要早一点睡觉，但是这个试卷明天早上必须交上。may”可以“；should”应该“；can”能，会，可能“；must”必须“。根据句意Kate熬夜到很晚，说明试卷明天必须交上，语气非常强，故应选D。

【点评】考查情态动词辨析，区分may，should，can，must的含义和用法。

43．—________ I have a cup of tea, Miss Anderson?

—Of course. Here you are.

A. May

B. Must

C. Need

D. Should

【答案】 A

【解析】【分析】句意：——安德森小姐，我可以喝一杯茶吗？——当然。给。A可以，表询问、请求；B必须，表命令；C需要；D应该，表建议。根据 I have a cup of tea.我可以喝一杯茶，可知是请求，应用情态动词may，故选A。

【点评】考查情态动词辨析。注意掌握不同情态动词的用法。

44．—Sir, you ________ use your mobile phone at the gas station. It's very dangerous. —Sorry, I will put it out soon.

A. mustn't

B. don't have to

C. needn't

D. may not

【答案】 A

【解析】【分析】句意：——先生，你不能在加油站用手机，太危险了。——对不起，我很快就会把它挂掉。A禁止，B不必，C不必，D可能不，根据 It's very dangerous，可知是禁止，故选A。

【点评】考查情态动词，注意根据 It's very dangerous 的语境选择用法。

45．—Hi，madam．Can I take the story books out？

—No，my boy．They _____ be taken out of the reading-room．It's a rule．

A. mustn't

B. needn't

C. couldn't

D. wouldn't

【答案】 A

【解析】【分析】句意：—嗨，夫人，我能把这些故事书拿出去吗？—不，孩子，他们不可以被带出阅览室，这是制度。A. mustn't不可以，禁止；B. needn't不必；C. couldn't不可能；D. wouldn't将不会．根据It's a rule，可知这是制度，所以你不可以把这些书带出去，mustn't不可以，禁止，故答案选A。

【点评】考查情态动词，表示禁止应使用mustn't。

46．—That must be Mr. John.

—No, it be him. I saw him off at the airport half an hour ago.

A. may not

B. mustn't

C. can't

D. needn't

【答案】 C

【解析】【分析】句意：——那一定是约翰先生。——不，不可能是他。我看见他在半小时前到达机场。nay not可能不是；mustn't一定不是；can't不可能是；needn't不必，英语中，肯定的推测用must；否定的推测用can't。依据 I saw him off at the airport half an hour ago. 可知不可能是他，所以应该是否定的推测，故选C。

【点评】此题考查情态动词。弄清每个情态动词的使用规则。根据语境和上下文的联系确定所使用的情态动词。

47．—I missed last night's Everlasting Classics（《经典咏流传》）！

—You care. You can watch it online later.

A. mustn't

B. can't

C. may not

D. needn't

【答案】 D

【解析】【分析】句意：——我错过了昨晚的《经典咏流传》！——你不必在意，以后你

可以上网看。A. mustn't不允许；B.can't不能； C. may not可能不； D. needn't不必。根据

You can watch it online later. "可知，此处意思是你不必在意。故选D。

【点评】考查情态动词。弄清每个情态动词的使用规则。

48．He _________ work on the farm every day. I'm sure about that because his skin is very black.

A. can't

B. may

C. must

D. couldn't

【答案】 C

【解析】【分析】句意：他一定每天在农场工作，我敢肯定，因为他的皮肤很黑。A. can't

不可能，对事情表示否定推测；B. may可以，可能；C. must一定、必须，表示非常肯定的

推测；D. couldn't不能。根据I'm sure about that because his skin is very black.可知他是在农

场上工作，此处表示肯定的推测，故选C。

【点评】此题考查情态动词。要掌握每个情态动词的使用方法。

49．— _________ I take my cousin Shirley with us, Mr. Wu？

— Yes, but we'll get there by bike. ____________ she ride a bike?

— Yes, and she ___________ ride a bike when she was only six years old.

A. Could; can; could

B. Can; can; can

C. Can; could; could

D. Could; could; can

【答案】 A

【解析】【分析】句意：-我能带我表弟雪莉和我们一起吗，吴先生？-是的，但我们将骑

自行车去那儿。她会骑自行车吗？-是的，她在六岁时就能骑自行车了。can，能，会，它

的过去式是could。在一般疑问句中could多表示委婉语气，而不是表过去。所以选A。

50．—Must I go out to have dinner with you, Mum?

—No, you , my dear. You're free to make your own decision.

A. shouldn't

B. mustn't

C. needn't

D. can't

【答案】 C

【解析】【分析】句意：——妈妈，我必须跟你出去吃饭吗？——不，你不必，亲爱的。

你可以自由作出你的决定。问句是must 构成的一般疑问句，根据no，可知是否定回答，

must的否定回答应会使用 needn 't，故答案是C。

【点评】考查情态动词needn't的用法，注意must构成的一般疑问句的否定回答。

高考英语专题情态动词知识点真题汇编及答案

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