【单选题】

The author thinks it is also very important to make sure ______.
A．when your visitors will leave

B．when your visitors will come
C．when you will have your houseguests
D．when you will have people staying with you

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根据网考网移动考试中心的统计，该试题：

73%的考友选择了A选项

4%的考友选择了B选项

16%的考友选择了C选项

7%的考友选择了D选项

The author thinks it is also very important to make sure ______.A．when your visitors will leave