2. 外语
  3. Doctors sometimes ______ old cures when modern medicine doesn’t work.

Doctors sometimes ______ old cures when modern medicine doesn’t work.

admin2010-05-25  91
问题 Doctors sometimes ______ old cures when modern medicine doesn’t work.
选项 A、fall on
B、fall down on
C、fall back on
D、fall in upon
答案C
解析 题型：词汇题。fall back on意思是“借助于”，如：She has no relatives to fall back on．fall down (on)意思是“倒下，跪倒，失败，未能符合要求”。fall on意思是在什么时候发生、来临。比如：Her birthday will fall on a Friday this year．他今年的生日是在一个礼拜五。fall in upon意思是“不期而遇”。
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