一、选择题1．—Tom, we’re going shopping at eight, right?—Yeah, but I ______ be a little late, so don’t wait for me.A．may B．should C．mustn’t2．—Must I finish the work today, Mum?—No, you ________.You can finish it tomorrow.A．mustn't B．can't C．shouldn't D．needn't 3．(2018·山东临沂) Could you please speak a little louder? I ______ hear you very well. A．can’t B．mustn’tC．shouldn’t D．needn’t4．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 5．You have finished most of the work, so you ____ start working so early tomorrow. You may come at 9 :00.A．can't B．mustn't C．needn't D．couldn't6．— Do you think it is safe to shop online?— I think so. On Taobao, customers return goods with no questions asked，but they ______ pay delivery costs.A．can’t; can B．must; must C．can; have to D．mustn’t; can 7．You______ worry about your lessons. Be careful next time and you will get a good mark. A．don’t need to B．not need C．needn’t to D．don’t need 8．—________your house be cleaned right now？—No,it needn't.It may be cleaned this afternoon．（）A．Must B．May C．Can9．—Can we walk across the road now?—No, we . We have to wait until the light turns green.A．couldn’t B．needn’t C．shouldn’t D．mustn’t 10．—I’d like ________ Guo Jingming’s Tiny Times.—You had better________ his books. The stories he tells are far from real life.A．buying, don’t read B．to buy, not readC．buying, not read D．to buy, not to read11．—Can I take some milk and biscuits to the reading room?—No, our school has a rule that students _______ eat or drink there.A．can’t B．mustn’t C．needn’t D．may not 12．— Could you play the piano when you were 8 years old?— ________.A．Yes, I could B．No, I can’t C．Yes, I can D．No, I won’t 13．You __ drive your car so fast. It's very dangerous.A．wouldn't B．shouldn't C．couldn't D．mightn't 14．—______ you please tell me something about the life in Canada or America?—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 15．One ______ easily lose his way when he visits or comes to a new place.A．may B．must C．need D．should 16．(2017·甘肃白银·10)—I wonder if these are Danny's glasses.—They________be Danny's. He doesn't wear glasses.A．can't B．must C．mustn't D．can17．— Must I finish the homework now?— .You can do it later.A．No, you needn’t B．Yes, you must C．No, you can’t18．Will you please________them________the Birdwatching Society?A．inviting; join B．to invite; to join C．invite; to join D．to invite; join 19．—Must I sleep now? —No, you________.A．needn't B．mustn't C．can't D．may not 20．—Could you help me download some Taylor Swift’s songs from Ku Gou?—Sorry, people download music from the Internet without paying, because it’s against the law. A．wouldn’t B．needn’tC．mustn’t D．couldn’t21．—________ David be the new chairperson of the Students’ Union?—He _______ be, but I’m not sure.A．Can; can’t B．Can; mayC．May; must D．May; mustn’t22．From March 23rd, 2013, anyone under the age of 14 ________ go into Disneyland alone. A．couldn’t B．mustn’t C．needn’t D．mightn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．A解析：A【解析】【详解】句意：——Tom，我们8点将会去购物，对么？——是的，但是我可能会晚一点，所以不要等我。
考查情态动词词义辨析。
A. may可能；B. should应该；C. mustn’t禁止。
根据句意可知是可能会晚到。
故选A。
2．D解析：D【解析】【详解】句意：-我必须今天做完这个工作吗，妈妈？-不，你不必。
你可以明天完成。
mustn’t禁止，不要；can’t不能，不会；shouldn’t不应该；needn’t不必，没有必要。
Must 的一般疑问句，肯定回答用must，否定回答应用needn’t。
故选D。
3．A解析：A【解析】【详解】句意：请你说大点声好吗？我不能很好地听到你说的话。
考查情态动词辨析。
can't不能，表示不能够；mustn't不许，表禁止；shouldn’t不应该，表劝诫；needn’t无需，表示没必要。
本句表示“不能够”，根据句意语境，可知BCD三项意思都与句意不合，故选A。
4．A解析：A【解析】【分析】【详解】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。
mustn’t 禁止，不允许；ought not to不应该，不应当；needn’t不必；don’t have to不必。
根据“No Smoking!”可知此处禁止吸烟，所以选A。
5．C解析：C【解析】【详解】句意：你已经完成了大部分工作，所以你明天不必这么早就开始工作。
你可以9点来。
本题考查情态动词。
can't不可能，mustn’t禁止，needn’t不必，couldn’t可能不。
根据You have finished most of the work可知，你已经完成了大部分工作，因此明天不必这么早就开始工作，因此用needn’t，故选C。
6．C解析：C【解析】【详解】句意：——你认为网上购物安全么？——我觉得是的。
淘宝上，消费者可以无理由退货，但是他们要承担运费。
考查情态动词辨析。
A. can’t; can不能，能；B. must; must必须，必须；C. can; have to可以，不得不；D. mustn’t; ca n禁止，能。
根据句意表示的是顾客能退货，是可以，第一空用can；但是不得不承担运费，非主观情愿用have to。
故选C。
7．A解析：A【解析】【详解】句意：你不必担心你的功课。
下次小心点，你会取得好成绩的。
考查动词need用法辨析。
need用作情态动词时常和不带to的不定式一起作谓语，否定式是将not置于其后，并有其否定的缩写形式needn't，在疑问和否定句中不加助动词；可知BCD三项表达错误。
用作行为动词时，need是一个普通的及物动词，用在肯定、否定和疑问句中均可，接不定式时要带to。
本句need用作及物动词，根据句意结构，故选A。
8．A解析：A【解析】【详解】句意：——你的房子必须现在打扫吗？——不，不必。