Ⅰ.单项填空
1.(2014·株洲高一检测)—Must I hand in this paper one hour later?
—Yes, you________.
A.need B.must
C.may D.will
答案：B 句意：我必须一小时后交文件吗?——是的，必须。must可以表“推测”或“必须”，当表示“必须”时，肯定回答也必须用must。
2.—Many boats near the seaside were destroyed by the wind.
—Well, the wind ________ have been very strong.
A.can B.must
C.need D.should
答案：B 句意：——海岸附近的很多船都被风破坏了。——哦，那场风一定很大。can表示实际的可能性时，常用于否定句和疑问句中，用于否定句时，意为“不可能”;must表示接近事实的肯定推测，用于肯定句;need表示“需要”;should表推测时常表示“合乎理想的事或结果”。故选B。
3.You ________ do the exercise if you don't want to.
A.may not B.can't
C.mustn't D.needn't
答案：D 考查情态动词。句意：如果你不想运动，就不必做。may not可能不;can't不可能;mustn't绝不可以;needn't不必。结合句意选D。
4.—Isn't that your head teacher over there?
—No, it ________ be him. I'm sure he has just left.
A.can't B.must not
C.won't D.may not
答案：A can't不可能;must not禁止;won't不愿或不会;may not可能不。根据语境及答语中的“I'm sure”，可知答话的人肯定那不是校长。
5.When we lived in that village，we________ often climb mountains together.
A.might B.should
C.could D.would
答案：D 句意：当我们在那个村庄住的时候，我们经常一起爬山。would在此表示过去习惯性的动作。
6.A machine ________ work for itself; it must be operated by man.
A.can't B.couldn't
C.may not D.might not
答案：A 句意：机器自己不能工作;必须有人操纵。can可以表示一种客观上的能力，本句can't，表示“不能，不会”。
7.You ________ leave the little boy alone at home. He is too young.
A.mustn't B.needn't
C.mightn't D.won't
答案：A 考查情态动词。句意：你不可以让小男孩单独待在家里，他太小了。mustn't绝不可以;needn't不必;mightn't可能不;won't不会。结合句意选A。
8.(2014·兰州高一检测) How ________ you say that you really understand the whole text if you have covered only part of it?
A.can B.must
C.need D.may
答案：A 句意：如果你只读了一部分，你怎么能说真正理解了整篇文章呢?can能，能够;must必须;need需要;may可以。结合句意选A。
9.—To work in the deep water is dangerous. What should we do?
—________the robots have a try?
A.Shall B.Must
C.Will D.May
答案：A shall用于第一、三人称疑问句中，表示说话人征求对方的意见或向对方请示。
10.It is strange that the old man usually particular about everything ________ accept the decision without doubt.
A.should B.would
C.can D.must
答案：A 考查情态动词。句意：那位通常对每件事情都挑剔的老人竟然毫无疑问地接受了这个决定，太奇怪了。should用来表示惊讶的语气，意为“竟然”。
