题目内容
You ________ all those calculations(计算)! We have a computer to do that sort of thing.
[ ]
A.needn't have done
B.shouldn't have done
C.mustn't have done
D.can't have done
答案:A
解析:
解析:
|
第二句话表明原来进行的计算根本没必要。 |
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