题目内容:
You __________ all those calculations! We have a computer to do that sort of thing.
A.needn't have done
B.must not have done
C.shouldn' t have done
D.can not have done
参考答案:
答案解析:
You __________ all those calculations! We have a computer to do that sort of thing.
A.needn't have done
B.must not have done
C.shouldn' t have done
D.can not have done