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You______ all those calculations! We have a computer to do that sort of thing.
（3.0分）
3.0 分
A、
needn’t have done
B、
must not have done
C、
shouldn’t have done
D、
can not have done
（3.0分）
3.0 分
A、
needn’t have done
B、
must not have done
C、
shouldn’t have done
D、
can not have done
参考答案
