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题目内容
（河南科技大学大学英语3(专升本)）
You ______ all those calculations. We have a computer to do that sort of thing.
选项:
A:must not have done
B:should not have
C:can not have done
D:needn.t have done
选项:
A:must not have done
B:should not have
C:can not have done
D:needn.t have done
参考答案
