2. 外语
  3. I tried as hard as I could to keep my promise to them. best I ____________________ break my promise to them.

I tried as hard as I could to keep my promise to them. best I ____________________ break my promise to them.

admin2010-12-18  67
问题  I tried as hard as I could to keep my promise to them.
    best
    I ____________________ break my promise to them.
选项
答案did/tried my best not to
解析 do/try one’s best to do sth意为“竭尽全力做某事”，其否定形式为do/try one’s best not to do sth。
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本试题收录于： BETS三级笔试题库北京英语水平考试（BETS）分类
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