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_____thewindowsbeforeyouleavetheclassroom.A.Toclose    ...

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_____thewindowsbeforeyouleavetheclassroom.A.Toclose    ...

_____ the windows before you leave the classroom.

A. To close        B. Closing      C. Closed      D. Close

【回答】

D

知识点:祈使句

题型:选择题

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