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There( )用适当的情态动词be someone in the office.The light is still on in it.

分类: 作业答案 • 2021-12-01 16:49:06

问题描述：

There( )用适当的情态动词be someone in the office.The light is still on in it.

答

填must,表示一定,因为后面说了灯还亮着,说明办公室里一定还有人