LiMingissocarefulthathealwayslooksoverhisexercisesto

问题详情：

Li Ming is so careful that he always looks over his exercises to ______ there are no 

      mistakes.

      A: make sure   B: find out    C:think of      D:come true

【回答】

A

知识点：动词和动词短语

题型：选择题