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    A clean environment can help the city bid for the Olympics, which ____ will promote its economic development.

    A. in nature          B. in return           C. in turn   D. in fact

    C. 

    解析：短语辨析。in turn 在这儿表示：相应地，转而。如：Increased production will, in turn, lead to increased profits.增加生产会继而增加利润。另外in turn 还可以表示“轮流”。

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