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

游客2024-07-15  8

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【B1】______ pollution. They are also concerned about whether the government is doing enough to【B2】______ the environment. However, people in Ireland don’t have these worries. They are sure that they have found the【B3】______ the problem. They use windmills. These windmills can create power without【B4】______ pollution. This method is so successful that other countries are【B5】______ doing the same. Why not? What works for Ireland can work for any other country? [br] 【B5】

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答案 thinking of

解析 这里是现在分词与are构成现在进行时,意为“正在考虑…”。
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