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____in smog as the pollution worsened, m...

____in smog as the pollution worsened, many cities of the Yangtze River Delta region had to close several freeways.

A. Blanketed    B. Having blanketed    C. Being blanketed    D. Blanketing

 

A 【解析】 考查非谓语动词。句意:随着污染的加剧,长三角地区的许多城市被雾霾笼罩,不得不关闭多条高速公路。本句中已经存在谓语动词had to,且句中没有连词,故blanket只能做非谓语动词,与逻辑主语cities构成被动关系,故用过去分词blanketed,故选A。  
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