◎ 题干
Why not     help when you were in trouble?
[     ]
A.you ask for
B.ask for
C. asking for
D.to ask for
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Why not help when you were in trouble?[ ]A.you ask forB.ask forC. asking forD.to ask for…”主要考查了你对  【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。