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【单选题】

I am very sorry for ______ for so long.
A．keep you waiting

B．having kept you waiting
C．waiting for you
D．keep you wait
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根据网考网移动考试中心的统计，该试题：

25%的考友选择了A选项

70%的考友选择了B选项

0%的考友选择了C选项

5%的考友选择了D选项

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