题目内容
【题目】The latest wave of smog(雾霾) ,_____ first swept into Shanghai and Jiangsu province on Dec. 1st ,_______ at least four car accidents due to low visibility.
A. in which; cause B. where ; caused
C. which ; has caused D. that; is caused
【答案】C
【解析】根据句子成分,第一个空引导非限制性定语从句,并在从句中做主语,选which;第二个空是句子的谓语,根据语境用完成时。选C。
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