1 . People liked O. Henry’s stories, because simple as the tales were, they ______ finish with a sudden change at the end, to the readers’ surprise.

A．could

B．would

C．might

D．must

2 . I advise you to stay away from Mary. Although she is usually easy-going, she ______be quite annoying sometimes.

A．can

B．need

C．must

D．should

3 . Social media platforms make different voices heard, but they ______ also spread false information.

A．must

B．can

C．should

D．need

4 . This road is narrow and the traffic on it is heavy, so sometimes it ______ be blocked.

A．should

B．shall

C．can

D．need

5 . My nephew William is still a puzzle to me—sometimes he is as quiet as a mouse, while he______be fairly active at other times.

A．should

B．need

C．must

D．can

6 . Generally speaking, it’s very hot in summer in my hometown, but at times it ______ be cool.

A．need

B．must

C．can

D．should

7 . —— Look at the man in pink over there! Is he John?
—— He ________ be John who is away on a business trip now.

A．shouldn’t

B．mustn’t

C．may not

D．can not

8 . It _________ be quite cold in the mountains at night, so you’d better take a thick coat.

A．would

B．need

C．dare

D．can

9 . The principles we are finding in the fruit fly(果蝇)brain-the logic and organization-________be the same as those in human brains. (用适当的词填空)

10 . 那么吵，他不可能睡得着觉。(can’t have done...)(汉译英)
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