2. 外语
  3. You can’ t ______your promise; all the people here are depending on you.

You can’ t ______your promise; all the people here are depending on you.

admin2011-01-26  29
问题 You can’ t ______your promise; all the people here are depending on you.
选项 A、back off
B、back up
C、back on to
D、back out of
答案D
解析 句意：你不能食言，这儿所有人都指望着你呢。Back out of收回，停止不干。 Back on后退。back up支持，援助；倒退。back on to背对着。
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