—The teacher asked all the students in the class to keep their eyes ______ fo...

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问题 —The teacher asked all the students in the class to keep their eyes ______ for 5 seconds.

选项 A. close
B. to close
C. closing
D. closed

答案D

解析老师要求班上所有的学生保持他们的眼睛闭上5秒。
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