【題目】There are several reasons _____ the smog days in many parts of China.

A. account forB. accounted for

C. accounting forD. to be accounted for

【答案】C

【解析】

試題分析：考查動詞時態(tài)語態(tài)。句意：中國多地的霧霾天氣由很多原因?qū)е�。非謂語動詞，動詞與主語之間是主動語態(tài)，故選C項。

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