问题
单项选择题
I was busy with my paper when I heard someone（）in the room above.
A.moving on
B.moving off
C.moving up
D.move about
答案
参考答案：D
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I was busy with my paper when I heard someone（）in the room above.
A.moving on
B.moving off
C.moving up
D.move about
参考答案：D