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【单选题】

In time of danger, David came to lend ______ and we smoothly carried out the plan in the end.
A．at hand

B．by hand
C．a hand
D．on hand
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参考答案：

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根据网考网移动考试中心的统计，该试题：

6%的考友选择了A选项

16%的考友选择了B选项

77%的考友选择了C选项

1%的考友选择了D选项

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