题目内容
Many provinces have been hit with smog. If _______ unsolved, the problem may lead to more serious results.
A. having left ????????????? ????????????? B. to leave? ????????????? ????????????? ????????????? C. left? ????????????? ????????????? ????????????? ????????????? D. leaving
【答案】
C
【解析】
试题分析:句意:很多省份都遭遇了雾霾,如果任由问题不解决,它会导致更严重的后果。这里if条件句是省略式,完整的是If the problem is left unsolved,…,如果主从句的主语一致的话,可以省略从句的主语和be动词,所以选C。
考点:考查省略句
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