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【题目】Air pollution will remain a problem for a long time. we’ve done a lot to solve it.

A.becauseB.sinceC.thoughD.if

【答案】C

【解析】

句意:空气污染将是一个长期的问题。尽管我们做了很多工作来解决它。

考查连词辨析。Because因为,表原因;Since自……以来,表时间/因为,表原因;Though虽然,尽管,表转折;If如果,表条件。分析句子可知,前后两句构成转折关系,表示“尽管我们做了很多工作来解决它”的含义,故选C

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