◎ 题干
— I don't know ________ this math problem. It's too hard.
— You can ask Mr. Liu for help.

[     ]

A. how to work out
B. when to draw up
C. how to give up
◎ 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“— I don't know ________ this math problem. It's too hard.— You can ask Mr. Liu for help. [ ]A. how to work out B. when to draw up C. how to give up …”主要考查了你对  【宾语从句】  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。