题目内容
---Our class must ________ clean and tidy every day.
---Everyone in our class should do something for it.
- A.keep
- B.be kept
- C.keeping
- D.to keep
B
解题点拨:句子的主语与谓语动词之间是动宾关系,应用被动语态.
解题点拨:句子的主语与谓语动词之间是动宾关系,应用被动语态.
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