题目内容
() 2. The river be dirty in our city,but now it is clean and you can see many fish in it.
A. used to B. planned to C. changed to D. happened to
2.A
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题目内容
() 2. The river be dirty in our city,but now it is clean and you can see many fish in it.
A. used to B. planned to C. changed to D. happened to