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【单选题】

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
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根据网考网移动考试中心的统计，该试题：

82%的考友选择了A选项

12%的考友选择了B选项

5%的考友选择了C选项

1%的考友选择了D选项

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