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【单选题】

______ what to do, he went to the manager for help.

A.Not to know

B.Not knowing
C.Not having known
D.Having not known
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根据网考网移动考试中心的统计,该试题:

13%的考友选择了A选项

85%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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