2. 外语
  3. The man assured himself that the bridge was safe before ______it.

The man assured himself that the bridge was safe before ______it.

admin2009-07-17  36
问题 The man assured himself that the bridge was safe before ______it.
选项 A、cross
B、acrossing
C、crossing
答案C
解析 cross 与across 的区别在于前者是动词“穿过”，而后者是介词例如：come across。题中的before 是介词，因此后面应该用动名词形式。
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