2. 外语
  3. Now Elaine regrets ______ hard enough while in the middle school.

Now Elaine regrets ______ hard enough while in the middle school.

admin2010-02-22  32
问题 Now Elaine regrets ______ hard enough while in the middle school.
选项 A、not to work
B、having not worked
C、not having worked
D、not have worked
答案C
解析
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