【单选题】

Please enter without knocking
A．You don't have to knock before you go in.

B．Please don't come in now.
C．You can go in without opening the door.

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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：

50%的考友选择了A选项

44%的考友选择了B选项

2%的考友选择了C选项

4%的考友选择了D选项

Please enter without knockingA．You don't have to knock before you go in.