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The staff in the shop▁busy selling things.A.is B.was C.am D.are

分类: 作业答案 • 2022-01-02 16:00:54

问题描述：

The staff in the shop▁busy selling things.
A.is B.was C.am D.are

答

D
因为staff为常用复数,所以A、C、B排除,只剩下D.
注意：B为is的过去式.