题目内容
The pollution problem here seems to get more and more serious .Something______with it.
- A.has done
- B.must be done
- C.is doing
- D.was done
B
此题重点考查含有情态动词的被动语态的基本构成和用法。
此题重点考查含有情态动词的被动语态的基本构成和用法。
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