【題目】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:空氣污染將是一個(gè)長(zhǎng)期的問題。盡管我們做了很多工作來解決它。

考查連詞辨析。Because因?yàn),表原因?/span>Since自……以來,表時(shí)間/因?yàn),表原因?/span>Though雖然,盡管,表轉(zhuǎn)折;If如果,表?xiàng)l件。分析句子可知,前后兩句構(gòu)成轉(zhuǎn)折關(guān)系,表示“盡管我們做了很多工作來解決它”的含義,故選C。

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