◎ 题干
---Are you free after school?
---Sorry, I’ve planned to treat a friend of mine to dinner___for his help.
A.in troubleB.in factC.in totalD.in return
◎ 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“ ---Are you free after school? ---Sorry, I’ve planned to treat a friend of mine to dinner___for his help.A.in troubleB.in factC.in totalD.in return…”主要考查了你对  【介词和介词短语】  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。