【题目】( ) 你想表达这条河曾经很脏，你可以说：
A. This river is very dirty. B. This river was very dirty then.
【答案】B
【解析】
略
【题目】( ) 你想表达这条河曾经很脏，你可以说：
A. This river is very dirty. B. This river was very dirty then.
【答案】B
【解析】
略
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