题目内容
17．There are so many foggy days recently．We all wonder_________．（ ）| A． | how is the air polluted | |
| B． | why the air is seriously polluted | |
| C． | what can we do to prevent that bad weather | |
| D． | what are the real reasons |
分析 最近有这么多雾天．我们都想知道为什么空气污染如此的严重．
解答 答案：B．
根据We all wonder--再结合选项，可知We all wonder后面是跟一个宾语从句，宾语从句中应该用陈述语序，即主语+谓语，所以排除ACD．选项Bwhy the air is seriously polluted为什么空气污染如此的严重，符合题意．故选：B．
点评 主要考查宾语从句，一定要注意宾语从句的引导词，以及宾语从句的时态和语序问题．把握好这几点，是做好此类题目的关键！就本题而言主要考查宾语从句的时态和语序．
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