◎ 题干
Ann is so careful that she always goes over her exercises to ______ there are no mistakes.
[     ]
A. look for
B. make sure
C. find out
D. think about
◎ 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“Ann is so careful that she always goes over her exercises to ______ there are no mistakes. [ ]A. look forB. make sure C. find out D. think about …”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。