1 . Young people________ respect old people.

A．shall

B．should

C．may

D．might

2 . In science, facts should be proved by experiments and research, and we ______ always believe everything we read and hear -- even if it is a great story.

A．can not

B．may not

C．must not

D．should not

3 . In the film The Million Pound Bank Note, Henry Adams is stuck in a foreign country without money and friends, and with nowhere to stay. While this situation _______ seem unusual, it _______ sometimes happen to travelers.

A．may; can	B．should; must
C．would; might	D．had better; ought to

4 . There is always a lot of traffic at this time of day. So I ________ arrive a bit late.

A．might

B．can

C．needn’t

D．mustn’t

5 . — Will you be free this weekend?
— I’m not sure, but I ________ go to an art exhibition with my parents.

A．will

B．should

C．must

D．may

6 . ---- Alice, don’t drive too fast, you ________ hit the others’ cars.
---- OK, I won’t, Dad.

A．can

B．need

C．may

D．must

7 . 人们假设，在宇宙中或许存在其他形式的生命，但他们不一定长得像人类。（......assumed）（汉译英）

8 . People’s abilities differ, but their rights and opportunities ________ be the same.

A．could

B．might

C．need

D．should

9 . If fish are jumping higher than usual or frogs are croaking more loudly, it________ rain.

A．must

B．may

C．shall

D．need

10 . 选用适当的单词或短语补全对话
Boss: All the documents     1     （must/can） be prepared before the meeting starts
Secretary: I know that. Kelly has been working on the documents since last Monday. She     2    （may/must）have got everything ready but I am not sure.
Boss: Wheres Kelly then?
Secretary: She     3     （must/has to）be in the sales managers office now. I saw her go in there a minute ago.