You______all those calculations! We have a computer to do that sort of thing.

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问题 You______all those calculations! We have a computer to do that sort of thing.

选项 A、needn’t have done
B、must not have done
C、shouldn’t have done
D、could not have done

答案A

解析 neean’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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