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题目内容
（三门峡职业技术学院英语读写）
You _____ all those calculations! We have a computer to do that sort of thing.
A.needn.t have done
B.shouldn.t have done
C.must not have done
D.can not have done
A.needn.t have done
B.shouldn.t have done
C.must not have done
D.can not have done
参考答案
