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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:

87%的考友选择了A选项

11%的考友选择了B选项

0%的考友选择了C选项

2%的考友选择了D选项

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