2. 外语
  3. They decided to take some actions ______ the situation turned too bad.

They decided to take some actions ______ the situation turned too bad.

admin2014-04-07  61
问题 They decided to take some actions ______ the situation turned too bad.
选项 A、until
B、unless
C、when
D、before
答案D
解析 before 引导时间状语从句，意为“在……之前”，“没等……就”。如：We had already finished supper before  he arrived.(在他到达之前我们已经吃完晚饭了。)
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