You______ all those calculations!We have&nbs-考呗网题库移动版

单选题 You______ all those calculations!We have a computer to do that sort of thing.

A． needn't have done
B． must not have done
C． shouldn't have done
D． could not have done

参考答案A

解析:【答案】A。解析：needn’t have done sth．意为“本不必做某事，但实际上做了”，本句句意为你根本不必做那些计算，我们有做那些事情的电脑。must not have done sth．意为“一定不能做某事”；shouldn’t have done sth．意为“不该做某事但做了”；could not have done sth．意为“不可能做某事”，这三项均不符合题意。故正确答案为A。

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单选题 At last the girl received the letter she______ for so long a time.

A． has been expecting
B． had been expecting
C． was expecting
D． had excepted

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单选题 She told her children that they must not______ play with matches.

A． by no means
B． in no sense
C． on any account
D． to good account

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单选题 You thought they could have completed the project, ______？

A． haven' t you
B． won' t you
C． doesn' t you
D． didn't you

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