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

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

admin2010-07-24  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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大学英语四级

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