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：短語(yǔ)辨析。in turn 在這兒表示：相應(yīng)地，轉(zhuǎn)而。如：Increased production will, in turn, lead to increased profits.增加生產(chǎn)會(huì)繼而增加利潤(rùn)。另外in turn 還可以表示“輪流”。

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