◎ 题干
It’s rude to laugh ______ others when they have trouble ______ something.
A.at; doB.to; doing
C.with ; to doD.at ;doing
◎ 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“It’s rude to laugh ______ others when they have trouble ______ something.A.at; doB.to; doingC.with ; to doD.at ;doing…”主要考查了你对  【日常用语、谚语】【情景交际】  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。