题目内容
【题目】The room _____ every day.
A. must clean B. must be cleaning C. must be cleaned D. is cleaning
【答案】C
【解析】句意：每天那个房间一定被打扫。主语the room与谓语clean之间是被动关系，故谓语用被动语态，故选C。
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题目内容
【题目】The room _____ every day.
A. must clean B. must be cleaning C. must be cleaned D. is cleaning
【答案】C
【解析】句意：每天那个房间一定被打扫。主语the room与谓语clean之间是被动关系，故谓语用被动语态，故选C。