题目内容
16．The documentary Under the Dome by Chai Jing tells us to do ______ to stop ______ our environment．（ ）| A． | something，polluting | B． | anything，to pollute | ||
| C． | everything，to pollute | D． | nothing，polluting |
分析 柴静的纪录片《穹顶之下》告诉我们要做些事情来阻止环境污染．
解答 答案：A．something意思是"某事"；anything意思是"任何事情"；everything意思是"一切事情"；nothing意思是"没什么事情"．stop doing sth．意思是"停止做某事"也就是停止正在做的事情；stop to do sth．意思是"停下来做另一件事情"．根据"stop ______ our environment"可知要停止污染环境，也就是停止正在进行的污染，所以第二个空要用动名词．另外根据"Chai Jing tells us to do ______ to stop"可知我们要做些事情来阻止污染的继续进行，所以要用something来填空，综上所述，故选A．
点评 首先要掌握这几个不定代词的意思，以及stop的用法，然后结合具体的题目，就可以确定正确答案．
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