You______all those calculations! We have a computer to do this sort of things.

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问题 You______all those calculations! We have a computer to do this sort of things.

选项 A、needn’ t have done
B、can’ t have done
C、mustn’ t have done
D、couldn’ t have done

答案A

解析你不需要做那些计算，我们有计算机做这类的事情。考点needn’t have done的用法，表示“不需要做某事但却做了”。

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