题目内容

The water in the river smells terrible. People must dirty things into it.

A. be stopped to throw B. be stopped from throwing

C. stop to throw D. stop from throwing

B 【解析】句意:河里的水闻起来很臭。人们必须禁止向它仍脏东西。stopfrom(doing)sth.意为“停止做某事”,stoptodosth.意为“停下来然后去做另一件事”,排除A、C项。根据句意可知,人们必须被禁止向它仍脏东西,people意为“人们”,作主语,与“乱扔垃圾”是被动关系,故应选用被动语态,这里含有情态动词must,助动词用be。故答案选B。 ...
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