Pollution has become a serious problem in almost all the big cities of the wo

游客2024-07-19  10

问题    Pollution has become a serious problem in almost all the big cities of the world. City people are becoming more and more worried about how they can  (11)   pollution. They are also concerned about whether the government is doing enough to  (12)   the e [br]  

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解析 这里是做动词found的宾语,意为“解决问题的答案”。
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