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—Wherearetherunners?—Overthere.They

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问题详情:

—Wherearetherunners?—Overthere.They

— Where are the runners?

— Over there. They ________ warming-up exercises.

A.is doing        B.do            C.are doing  D.does

【回答】

C

知识点:动词时态

题型:选择题