There are so many foggy days these days. We all wonder .A. how is the air pollutedB. why the air is

题目简介

There are so many foggy days these days. We all wonder .A. how is the air pollutedB. why the air is

题目详情

There are so many foggy days these days. We all wonder                   .
A. how is the air polluted          
B. why the air is polluted seriously
C. what are the real reasons
题型:单选题难度:中档来源:不详

答案

B

试题分析:句意:---这些日子有许多雾天。我们都想知道为什么空气被污染的这么严重。根据句子意思,故选B.

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