You______(本来不必进行) all those calculations. We have a computer to do that sort of

游客2023-07-26  19

问题 You______(本来不必进行) all those calculations. We have a computer to do that sort of thing.

选项

答案 needn’t have done

解析 “本不必……(而事实上做了)”用needn’t have done sth.来表达。
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