2. 专升本
  3. You______all those calculations! We have a computer to do that sort of thing.

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、can not have done
答案A
解析
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