2. 外语
  3. TheyWere invited to an important ball ______ the first time in their life.

TheyWere invited to an important ball ______ the first time in their life.

admin2009-06-21  62
问题 TheyWere invited to an important ball ______ the first time in their life.
选项 A、for
B、at
C、on
答案A
解析 at后加时间，是指确切的时间，例如at 2：30； on加时间指的是一天中的某段时间，例如 on Friday evening。
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