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【单选题】

You ______ the experiment twice, not once.
A．should have carried out

B．shouldn't have carried out
C．haven't carried out
D．couldn't have carried out
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根据网考网移动考试中心的统计，该试题：

55%的考友选择了A选项

31%的考友选择了B选项

4%的考友选择了C选项

10%的考友选择了D选项

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