◎ 题干
We must do something to stop people from ______.

A. to throw litter about
B. to throw litter into
C. throwing litter about
D. throwing litter into
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“We must do something to stop people from ______. [ ]A. to throw litter about B. to throw litter into C. throwing litter about D. throwing litter into …”主要考查了你对  【动名词】【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。