一、选择题1．—Jack must be in his office, I think.—No, he be in the office. He flew to Canada this morning.A．needn't B．shouldn't C．can't D．mustn't 2．Since you are very tired, you ______ finish the work today.A．needn’t B．may not C．mustn’t D．can’t 3．―I can't stop smoking, Doctor.―For your health, I'm afraid you .A．must B．can C．need D．have to 4．―I didn’t pass the driving test again.―Don't worry. Just like the weather, life be beautiful all the time.A．can't B．needn't C．shouldn't D．mustn't 5．All passengers_____ go through safety check before they take a plane.A．may B．can C．must D．need 6．—________your house be cleaned right now？—No,it needn't.It may be cleaned this afternoon．（）A．Must B．May C．Can7．A: Is Jim coming by train?B: I’m not sure. He _______ drive his car.A．must B．may C．need D．should 8．—Doesn’t Frank like staying at home and looking after his little sister?—_______, but he ________ because both of his parents work.A．Yes; has to B．No; has toC．Yes; doesn’t have to D．No; doesn’t have to 9．—Look! Mrs. Smith is standing in front of the teaching building.—It______ her. She has gone to Egypt for her holiday.A．must be B．mustn’t be C．can be D．can’t be 10．— I wonder if these are Jim's glasses.—They _____his. He doesn't wear glasses.A．might be B．could be C．can't be 11．One ______ easily lose his way when he visits or comes to a new place. A．may B．must C．need D．should 12．I’m sorry, children over 1.4 meters________pay the full price for the show. A．may B．must C．can D．ought to 13．—Could you please hang out with me this afternoon?—______. I have to make a plan for Clean-Up Day.A．Sorry, I couldn’t B．Sorry, I can’tC．Sure, I can D．Sure, I could14．—Must I start now?—No, you_______________.A．mustn't B．can't C．needn't D．must 15．(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．can16．The flowers ________ every day, or they will die.A．must water B．can be wateredC．should water D．must be watered17．— Will Jim come to Yangzhou for a holiday?— He ________come, it depends on how much homework he will have.A．may B．should C．must D．need 18．—Could you help me download some Taylor Swift’s songs from Ku Gou?—Sorry, people download music from the Internet withou t paying, because it’s against the law. A．wouldn’t B．needn’tC．mustn’t D．couldn’t19．一Already five people in the taxi, but the driver managed to take me as well.一Terrible, and it be an uncomfortable journey.A．can B．should C．must D．need20．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might 21．— 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 22．—Jenny, we buy Mom presents. We can clean the house from top to bottom.—Good idea! It’s a special present for Mother’s Day.A．can’t B．mustn’tC．shouldn’t D．needn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——我想杰克一定在他的办公室里。
——不，他不可能在办公室里。
他今天早晨飞往加拿大了。
考查情态动词。
A. needn't不需要；B. shouldn't不应该；C. can't不可能；D. mustn't表示禁止，不可以。
根据下文He flew to Canada this morning.他今天早晨飞往加拿大了，可以判断他不可能在办公室里，表示否定推测，应用can't“不可能”，故答案选C。
2．A解析：A【解析】【详解】句意：既然你很累，今天就不必完成这项工作了。
A. needn’t不必；B. may not 可能不；C. mustn’t禁止；D. can’t不能。
根据上文Since you are very tired,可知，情态动词needn’t表示不需要，后面直接加动词原形。
根据题意，故选A。
3．D解析：D【解析】【详解】句意：——我不能戒烟，医生。
——为了你的健康，恐怕你得这么做。
考查情态动词辨析。
must必须，强调主观意愿；can能，表能力或许可；need需要，指有必要；have to必须，强调客观需要。
根据“For your health为了你的健康”，可知无论愿不愿意戒烟是健康所需，故选D。
4．A解析：A【解析】【详解】句意：——我驾照考试又失败了。
——别担心。
就像天气一样，生活也不可能一直是美丽的。
考查情态动词。
can't不可能；needn't不必；shouldn't不应该；mustn't一定不能。
根据句意，应是不可能一直美丽。
故选A。
5．C解析：C【解析】【详解】句意：所有乘客在乘坐飞机前必须经过安全检查。
考查情态动词辨析。
may可以，表许可或请求；can能，表能力或许可；must必须，指一定；need需要，指有必要。
根据句意语境可知，安检强调“必须，一定”，故选C。
6．A解析：A【解析】句意：——你的房子必须现在打扫吗？——不，不必。
可以今天下午打扫。
考查情态动词辨析。
must 必须；may 可以；can 能。
根据下文回答needn't 不必，可知，上文的一般疑问句中用助动词must表示“必须”。
故选A。
【点睛】情态动词must表示“必须”，由must引起的疑问句中，肯定答语用must，否定答语用needn’t或don’t have to，表示“不必”。
7．B解析：B【解析】【详解】句意：——吉姆坐火车来吗？——我不确定，他可能开自己的车。
考查情态动词辨析。
A项，必须，一定，表示肯定推测；B项，也许，表示有可能；C项，需要；D项，应该。
根据回答部分I’m not sure.可知，此处并不确定吉姆是开车来还是乘坐火车来，所以此处是“可能”。
故选B。
【点睛】must意为“必须，应该”，可以表示主观上一定要做什么或者肯定推测。
例如：I must go home to look after my mum. This pair of shoes must be hers. may意为“可以，也许”，可以表示请求或者推测（无法断定）。
例如：May I come in？ It may be hers，but I’m not sure. need意为“需要”，既是情态动词也是行为动词。
例如：You needn’t finish your homework right now. You need to tell him the truth. should意为“应该”，表示责任或者义务。