◎ 题干
Mary couldn’t go to the cinema with us because she had to _____ her little brother.
A.  look for  B.  look after  C.  look at   D . look into
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Mary couldn’t go to the cinema with us because she had to _____ her little brother.A. look for B. look afterC. look at D. look into…”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  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。