LiMingissocarefulthathealwayslooksoverhisexerciseto

問題詳情：

 Li Ming is so careful that he always looks over his exercise to_____ there are no

      mistakes.

  A. look for         B. find out                C. end up         D. make sure

【回答】

D

知識點：動詞和動詞短語

題型：選擇題