外研版英语英语情态动词考点+例题_全面解析含答案解析百度文库
【英语】情态动词练习题含答案及解析
【英语】情态动词练习题含答案及解析一、单项选择情态动词1．—Can I pay the bill by check?—Sorry，sir．But it is the management rules of our hotel that payment _____ be made in cash．A．shall B．needC．will D．can【答案】A【解析】【详解】考察情态动词用法。
句意：——我能用支票付账吗?——对不起,先生。
但这是我们酒店的管理规定,支付要用现金。
shall可以表示命令，警告，强制，或者指规则和法律要求做的事情。
本题正是考察了shall表示按照规则和法律要求做的事情。
故A正确。
2．You _____ be right but I’m going back to check anyway.A．should B．must C．need D．might【答案】D【解析】【详解】考查情态动词。
句意：你或许是对的，但我还是要回去核对一下。
A. should应该；B. must 一定，必须；C. need需要；D. might或许。
本题主要考查情态动词表示推测的用法，由I’m going back to check anyway可知，我对此不确定。
由此可知，D项符合题意。
故选D项。
【点睛】can / could用于表推测的用法(1) 从使用句型上看，can 通常只用于否定句或疑问句，一般不用于肯定句，而could 可用于肯定句、否定句和疑问句。
两者没有时间上的差别，只是could 比 can 更委婉，更不确定。
(2) 从时间关系看，对现在或将来情况作推测，后接动词原形；对正在进行的情况作推测，后接 be doing 结构；对过去情况作推测，后接动词完成式。
二、 may / might用于表推测的用法表示推测，两者都可用，只是 might 比 may 语气更不确定，表示的可能性更小。
英语情态动词含答案解析
英语情态动词含答案解析一、情态动词单项选择题1．一There is somebody knocking at the door. Who ________ it be?一I'm not sure. But it ________ be a delivery man(快递员). I bought something on Pin Duoduo. A．may; must B．must; can C．can; may D．must; may【答案】C【解析】【分析】【详解】句意：——有人在敲门。
会是谁呢？——我不确定。
但可能是快递员。
我在拼多多上买了些东西。
考查情态动词。
may可能；可以；must必须；一定；can可能，能。
第一句话是特殊疑问句，表示“可能”，应用can；根据答语中“I’m not sure”可知，第二个空用may表示“可能”。
故选C。
2．—My legs hurts, and I ________ see very well. Will I go blind?—No, you’ve just hit your head.A．may B．can C．may not D．can’t【答案】D【解析】【详解】句意：——我的腿疼，我看不太清楚。
会失明吗？——不，你只是撞到了头。
考查情态动词。
may可以；can能；may not可能不；can’t不能；根据“Will I go blind?”可知，此处说的是看不清楚，空处表达的是“不能”，应用can’t，故选D。
3．—________ you please tell me something about the life in Canada?—Sorry, I ________. I don’t know either. I’m from Australia.A．Could; couldn’t B．Can; couldn’t C．Could; can’t D．Can; mustn’t【答案】C【解析】【详解】句意：——你能给我讲讲加拿大的生活吗？——对不起，我不能。
英语情态动词含答案解析
英语情态动词含答案解析一、情态动词单项选择题1．It’s quite cold outside. You’d better ________ the windows or the door.A．open B．not to open C．don’t open D．not open【答案】D【解析】【详解】句意：外面很冷。
你最好不要打开窗户或门。
考查固定句型，open v. 开。
had better (not) do sth.最好(不)做某事，根据“It’s quite cold outsi de.”可知应该是最好不要开窗户或门，故选D。
2．—I cannot find my pen. ________ I borrow yours?—Sure.A．Can B．Must C．Should D．Would【答案】A【解析】【详解】句意：——我找不到我的钢笔。
我可以借你的吗？——当然。
考查情态动词辨析。
can可以；must必须；should应该；would将。
根据“I borrow yours”可知，此处应用can表请求允许，希望能借对方的钢笔用一下，故选A。
3．—Is that Miss Liu over there?—No. It ________ be her. She has gone to the USA．A．mustn't B．can't C．won't D．needn't【答案】B【解析】【分析】【详解】句意：——是刘小姐在那边吗？——不是。
那不可能是她。
她去美国了。
考查情态动词。
mustn’t不准；can’t不可能；won’t将不；needn’t没必要。
根据“She has gone to the USA她去美国了”可知那不可能是刘小姐，应用“can’t”表示否定推测。
故选B。
4．—Look, the lady in red ________ be our English teacher.—No, she________be. She is in the office now.A．must; can’t B．can; mustn'tC．may; mustn’t D．shall; can’t【答案】A【解析】【详解】句意：——看，穿红衣服的那位女士一定是我们的英语老师。
英语情态动词题20套(带答案)含解析
【解析】
【详解】
考查must have done结构。句意：——吉姆一定觉得我说的话很让人烦，尽管他什么也没说。——所以你是说你得向他道歉？根据“though he didn’t say anything.”可知此处表示对过去事情的肯定推测，用must have done表示“过去一定做了……”，故D项正确。
2、should作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作“万一”、“竟然”,这时也可将should置于从句之首,即将should放在主语前面,而省略从属连词if。例如：If you should fail to come, ask Mrs Chen to work in your place.（= Should you fail to come, ask Mrs Chen to work in your place.）
A．mayB．canC．mustD．ould
【答案】C
【解析】
【详解】
考查情态动词表猜测的用法。句意：一定是汤姆把车停在这儿的，因为他是唯一有车的人。A. may可能；B. can可能；C. must一定；D. should应该。由as he is the only one with a car.可知一定是他把车停在这里的，非常有把握的肯定推测，故选C。
2．One of our rules is that every student _______ wear school uniform while at school.
A．mightB．could
C．shallD．will
【答案】C
【解析】
【详解】
考查情态动词辨析。句意：我们其中一条规则要求每个学生在校期间都要穿校服。shall可以表示“命令，警告，强制要求；允诺；法律，规定要做……”，结合句意可知C正确。
外研版英语英语情态动词用法总结含答案百度文库
外研版英语英语情态动词用法总结含答案百度文库一、初中英语情态动词1．— Dick, ________ I use your e-dictionary? — Yes, sure. ________ you give it to David after you use it?A. will; WouldB. may; MightC. can; CouldD. shall; Should【答案】 C【解析】【分析】句意:一Dick我可用一下你的电子词典吗?一当然可以。
在你用完后你能把它给他David吗？根据句意及题干分析第一空表示请求允许，所以可以用may或can;第二空是表示对别人的请求.所以用could表示更加委婉，故选C。
2．All passengers ______ go through safety check before they take a plane.A. canB. mayC. mustD. could【答案】 C【解析】【分析】句意：所有乘客登机前必须接受安全检查。
A. can能够，表示能力；B. may可以，表示许可；C. must必须；D. could可能，可以。
登机前必须安检。
故选C。
【点评】情态动词词义辨析。
以及can、may、must、could四个词的词义和用法。
3．—I missed last night's Everlasting Classics（《经典咏流传》）！—You care. You can watch it online later.A. mustn'tB. can'tC. may notD. 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。
外研版完整版英语情态动词用法总结(完整)
外研版完整版英语情态动词用法总结(完整)一、选择题1．Our Chemistry teacher always tells us we ________ be too hardworking before the exams. A．mustn’t B．shouldn’t C．needn’t D．can’t2．To my joy, we_________ go to the bank. Mary has lent us some money.A．shouldn’t B．needn’t C．couldn’t D．wouldn’t 3．—Could I join you in the programme?—Sorry, you ________. You are too young.A．shouldn’t B．mustn’t C．can’t D．needn’t4．To avoid ________, we’d better ________ the parents’ meeting online.A．gather; hold B．gathering; hold C．gather; holding D．to gather; to hold 5．You ________ require others to do with the problem like you. Everyone has his own way. A．mustn’t B．needn’t C．may not D．shouldn’t6．—I must go to school today, ________?—No, you ________.You can go as soon as you get well.A．mustn’t I;needn’t B．needn’t I;needn’tC．mustn’t I;mustn’t D．needn’t I;mustn’t7．—How do you like my new dress?—Well, if I ________ say, it is not suitable for you.A．may B．must C．have to D．should8．—The high school entrance examination is coming!— Yes, our teacher tells us we ________ be too careful while taking exams.A．mustn’t B．shouldn’t C．needn’t D．can’t9．Sorry, smoking is not allowed here. If you ________ , you will be fined according to the rules. A．can B．will C．may D．must10．We shouldn’t throw any objec ts from the building. Even a small object ________ cause serious injuries or death, when dropped from a great height.A．must B．should C．may D．need11．—Do we have to finish this today?—Yes, you ________ . Today is the last day.A．would B．may C．can D．must12．You'd better __________ hard from now on, __________ you will fail the exam. A．work; and B．working; or C．working; and D．work; or 13．When you visit a museum, some instructions should ________ and we’d better not ________ them.A．pay attention to; be against B．be paid attention; againstC．be paid attention to; against D．be paid attention to; be against14．I ________ hear you clearly. Would you please repeat it?A．mustn’t B．can’t C．needn’t D．shouldn’t15．A lot of online resources ________ be used either by teachers at school or parents at home.A．can B．should C．need D．must 16．—Have you decided to take up teaching as career after graduation?—I ________ go abroad for further education instead. But it depends.A．must B．should C．may D．shall17．We’ve discussed e very detail of this plan and have got everything ready. But still something __________ go wrong. We still have to be very careful.A．must B．should C．would D．may18．You ______ pay too much attention to your pronunciation, as it is so important in the oral （口头的） test.A．shouldn’t B．mustn’t C．can’t D．needn’t 19．—Ready? Let’s get started, Martin.— Swimming? I just ________ get used to it in winter.A．can’t B．needn’t C．mustn’t D．shouldn’t 20．—Be careful! Fire ________ be dangerous sometimes.—OK. I will put it out right away.A．mustn’t B．should C．can D．needn’t 21．—Will dad arrive home at 6 o’clock to have dinner with us this evening?— I think he will, but he ________ not. Sometimes he works extra hours.A．can B．must C．need D．may22．You _________ smoke here! Look at the sign. It says "No smoking".A．needn't B．mustn't C．can D．may 23．—Must I finish all my homework today, Mum?—No, you ________, my dear. You can finish some tomorrow if you like.A．needn’t B．shouldn’t C．can’t D．mustn’t24．We've discussed every detail of this plan and have got everything ready. But still something ________ go wrong. We still have to be very careful.A．must B．should C．would D．may25．Never throw objects from the building. Even a small object ________ cause serious injuries, or death, when dropped from a great height.A．must B．should C．may D．need26．— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A．can’t B．mustn’t C．may not D．needn’t 27．—Will Jim come to Yangzhou for a holiday?—He ________come and it depends on how much homework he will have.A．may B．should C．must D．need28．I think all the students love the weekends because, to them, they ________ get up early on Saturdays or Sundays.A．mustn’t B．don’t need C．needn’t D．can’t29．—Is it really necessary for me to go shopping with a mask on?—I’m afraid you ________ in public. It is not only to protect yourself but also to protect others. A．must B．should C．can D．need 30．—Shall I tell him the change of the time right now?—I’m afraid you ________, otherwise he will be late for the meeting.A．can B．may C．must D．need31．A hard-working man ________ become a great scientist, but a great scientist ________ be a hard-working man.A．can’t; can B．may not; must C．can’t; must D．may not; can 32．—Seventy dollars for such a dress! You ________ be joking!—I’m serious. It’s made of silk from Hangzhou.A．must B．need C．will D．can33．Cars ________ give way to walkers on some roads in Binhai, or the drivers will be fined. A．may B．will C．can D．must34．Mr. Black ________ be at home now. He went abroad on vacation last Friday.A．can’t B．mustn’t C．needn’t D．shouldn’t 35．—Could you tell me how to renew the library books?—With pleasure. You ________ come to our desk every time. It’s easier to renew them online. A．can’t B．mustn’t C．needn’t D．shouldn’t 36．—How beautiful the winter jasmines (迎春花) are!—Yes. These golden-yellow flowers ________ be widely seen in my city in March.A．must B．can C．would D．should 37．—Who’s the man over there? Is that Mr. Black?—It ________ be him. Mr. Black is much taller than that man.A．may B．must C．can’t D．mustn’t38．You ________ drive after drinking alcohol(酒). It’s against the law.A．mustn’t B．needn’t C．couldn’t D．wouldn’t 39．—Who’s singing next door? Is it Miss Wang?—It ________ b e her. She’s having the board meeting.A．can’t B．shouldn’t C．mustn’t D．needn’t40．— Is the boy over there Tom? He often wears a jacket like that.— It _______ be him. He is absent from school today.A．needn’t B．shouldn’t C．mustn’t D．can’t【参考答案】一、选择题1．D解析：D【详解】句意：我们的化学老师总是告诉我们考试前怎样用功都不为过。
Module10情态动词may might(重点语法提升练)(外研版)
2022-2023学年八年级英语上册单元模块满分必刷题（外研版）Module 10【刷语法】(重点语法提升练)情态动词may mightmay的用法：（1）表示请求、许可，比can 正式，如：May I borrow your bike? 我可以借你的自行车吗？You may go home now. 现在你可以回家了。
（2）表示推测，谈论可能性，意为“ 可能，或许”，一般用于肯定句中。
如：It may rain tomorrow . 明天可能会下雨。
（3）may的过去式为might，表示推测时。
可能性低于may。
如：He is away from school. He might be sick.（4）表示希望、祈求、祝愿，常可译为“祝愿”。
通常是用may +主+V如：May you have a good time. 祝你过得愉快。
May you succeed！祝你成功！一、单项选择1．—Where is David?—He ________ be in the playground because he loves playing basketball.A．may B．will C．can’t D．mustn’t2．—Where will you go during the Spring Festival?—I have no idea. We _________ go to Nanjing Gingko Lake Park. It’s a good place to have fun. A．may B．must C．should D．need3．—May I watch TV, Mom?—I’m afraid you ________.A．should not B．can’t C．must not4．—It’s time to go home. But where is Bruce?—_________ he is cleaning the classroom. Or he ________ in the school library.A．May be; maybe B．Maybe; may be C．May be; may be D．Maybe; maybe 5．—We plan to have a class trip tomorrow. Will it be sunny?—It ________ fine. Who knows? The weather always changes quickly.A．may be B．will be C．must be D．maybe6．—How many points can you get in the coming English exam, dear?—Sorry, I’m not sure. I ________ be able to get over 90.A．must B．need C．may D．should 7．—Sandy, how will Tom come to the party?—He ________ drive his car, but I’m not sure.A．must B．can C．may D．should 8．—Bob, where is Linda?—She ________ be in the library, but I am not sure about it.A．must B．may C．need D．has to 9．Jane has lived here for a long time, so she ________ know something about it.A．can B．may C．maybe D．may be 10．—Living in the countryside ________ fun because the nature there is so beautiful.—But I want to live in the city.A．must be B．may beC．might be D．quite be11．—If traveling by space is not too expensive (昂贵的), everyone ________ travel in space.—So traveling by space must be expensive.A．could B．may C．had to D．must to 12．—Where is Cecily?—She ________ be in the library, but I am not sure.A．would B．may C．must D．need13．—I hear you’ve got a new watch. _________ I have a look?—Sure. Here you are.A．May B．Must C．Would D．Should 14．—How is your father going to Nanning?— I am not sure. He ________ drive there.A．can B．may C．must D．will 15．—Lucy, which song will you choose for your show?—I ________ choose Lonely Warrior. I need more advice.A．must B．may C．would D．should 16．—Excuse me, ________ I have the seat by the window?—Sorry. Someone has taken it.A．must B．should C．need D．may 17．—Must we hand in the exercise when the class is over, sir?—I’m afraid so. You _________ finish it in fifteen minutes.A．can B．may C．will D．have to 18．Some people ________ feel sick when they read a book in a moving car or on a moving boat. A．must B．should C．may D．need19．There ________ be a fashion show on weekends, but I’m not sure.A．must B．can C．might D．would 20．—What will the weather be like tomorrow?—It ________ be rainy, cloudy or windy. I’m not sure.A．would B．shall C．might D．should 21．Don’t let the children play here. They ________ break something valuable.A．might B．might not C．need D．needn’t22．I_________ go to America to visit you if I have free time next year.A．might B．need C．might not D．needn’t 23．—What are you going to do this weekend, Max?—I ________ go to see the movie Coming Home, but I am not sure.A．must B．need C．might D．should 24．—What will the weather be like tomorrow?—It ________ be rainy, cloudy or sunny. Who knows?A．must B．might C．should D．has to25．I think I ________ be a singer when I grow up. But I’m not sure.A．might B．must C．can D．should 26．—What will the weather be like tomorrow?—I’m not sure. It ________be rainy.A．might B．must C．should D．will27．The editors ________ decide the title of the newspaper as soon as possible. A．could B．might C．may D．ought to 28．—Are you going to the art museum this weekend?—I’m not sure. I ________ go to the concert instead.A．must B．would C．should D．might 29．— Where are you going to spend the coming winter vacation?— I’m not sure. I ________ go to Shanghai with my parents.A．might B．need C．should D．must 30．—Will you go home for the Spring Festival?—I ________. But I’m not sure.A．might B．can C．must D．need二、完成句子31．他们可能得去会见朋友。
英语情态动词含答案解析
英语情态动词含答案解析一、情态动词单项选择题1．It’s raining all day, so I _________ stay at home.A．must B．have to C．must to D．can【答案】B【解析】【分析】【详解】句意：整天都在下雨，所以我不得不待在家。
考查情态动词。
must必须（主观上）；have to不得不（客观上）；must to错误结构；can 能。
根据“It’s raining all day”可知这是客观条件下“不得不待在家”。
故选B。
2．We teenagers ________ have dreams. With dreams and hard work, anything amazing________ be created.A．may; can B．might; should C．should; can D．must; has to【答案】C【解析】【分析】【详解】句意：我们青少年应该有梦想。
有梦想和努力，任何惊人的事都能被创造。
考查情态动词。
may可能；can能够；should应该；might可能；has to不得不；must必须。
第一个空表示“应该”，用should；第二个空表示能力，用can。
故选C。
3．—Have you heard about the temperature of the earth will rise to 45℃ in 2020?—Don’t worry! The news ________ be true.A．must not B．needn’t C．may not D．will not【答案】C【解析】【详解】句意：——你听说过2020年地球温度将上升到45摄氏度吗？——别担心！这消息可能不是真的。
考查情态动词。
must not一定不要，表禁止；needn’t不需要；may not可能不；will not将不会。
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外研版英语英语情态动词考点+例题_全面解析含答案解析百度文库一、初中英语情态动词1．—Look! The woman at the school gate ______be her headmaster.—No, it ______ be her. She is holding a meeting in the office now.A. must; can'tB. must; mustn'tC. can; needn'tD. may; mustn't【答案】 A【解析】【分析】句意：——看！学校门口的那个妇女一定是她的校长。
——不，不可能是她。
第一空，must表示“一定”；空二，根据She is holding a meeting in the office now. 她现在正在办公室开会，可知，不可能是校长，用can't，表示不可能。
故选A。
【点评】考查情态动词辨析。
注意不同情态动词的用法，注意理解句意。
2．—Where is Monica? I can't find her anywhere.—She be in the library. She loves reading books when she is free.A. mustB. needC. can't【答案】 A【解析】【分析】句意：——莫妮卡在哪？我到处都找不到她。
——她肯定在图书馆，她喜欢空闲时看书。
A肯定，肯定句中表示推测，B需要，C不可能，否定句中表示推测，根据 She loves reading books when she is free ，可知是肯定句表示推测，故选A。
【点评】考查情态动词，注意情态动词表推测的用法。
3．Teenagers allowed to drive .A. should not beB. should be notC. 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。
4．You be tired after walking for such a long time. Sit down and have a rest.A. canB. can'tC. mustn'tD. 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。
5．—Where is Mom now?—I'm not sure. She _________ be in the kitchen.A. shallB. mayC. needD. 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。
6．—Who it be that is knocking at the door?—It be father, but I'm not sure.A. call; mustB. can; mayC. must; canD. 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。
7．I can't go with you. I _______ stay at home until my parents come back.A. canB. mayC. mustD. could【答案】 C【解析】【分析】句意：我不能和你一起去。
我必须呆在家直到我父母回来。
A. can能，表示能力；B. may可以，表示许可；C. must必须，强调主观愿望；D. could可以，表示允许、请求。
父母没回来前，我必须待在家。
故选C。
【点评】此题考查情态动词的用法。
8．We don't allow taking magazines out, but you ____________ copy the article you need on the machine over there.A. canB. mustC. shouldD. 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。
9．The girl riding a horse there be Shirley. Her left leg was badly hurt in an accident yesterday.A. needn'tB. may notC. can'tD. 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。
10．—He be in the classroom,I think.—No, he be in the classroom. I saw him go home a minute ago.A. can； may notB. must； may notC. may； mustn'tD. 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。
11．— We've ordered too much food. I eat any more.—Never mind. Let' take it home.A. can'tB. mustn'tC. needn'tD. shouldn't【答案】 A【解析】【分析】句意：——我们已经点了太多的食物，我不能再吃了。
——没关系，我们带回家吧。
can't不能；mustn't必须不；一定不要；needn't不必；shouldn't不应该。
根据句意可知选Ａ。
【点评】考查情态动词辨析。
12．—Life is becoming convenient with the Internet.—That's true! Almost everything ______ be done online.A. mustB. couldC. shouldD. 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 theInternet. 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。
13．——Do you have any plans for this summer vacation? ——I'm not sure. I ___ take a trip to Taiwan.A. mustB. needC. mayD. should【答案】C【解析】【分析】句意:一今天暑假你有什么计划吗?一我还不确定。
我可能去台湾去旅行。
A.必须，一定;B.需要，必要;C.可能;D.应该。
根据句中I'm not sure可知，说话人还没有确定的计划，所以这只是一个可能，应选C。
14．Please don't make so much noise. I ________ hear the speaker very well.A. needn'tB. can'tC. shouldn'tD. mustn't【答案】 B【解析】【分析】句意：请不要发出那么多噪音。
我不能很好地听清楚发言者的话。
needn't不必；can't不能；shouldn't不应该；mustn't禁止。
根据前半句的Please don't make so much noise.可知别人发出了太多噪音，所以他无法听见演讲者的话，故用情态动词can't。
故选B。
【点评】考查情态动词，结合句意和词义做出判断。
15． Look! The traffic light has turned red. We _____ stop our car.A. canB. can'tC. mustD. 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。