2. 外语
  3. There is a new problem involved in the popularity of private cars ______road conditions need______.

There is a new problem involved in the popularity of private cars ______road conditions need______.

admin2010-02-22  55
问题 There is a new problem involved in the popularity of private cars ______road conditions need______.
选项 A、that; to be improved
B、which; to be improved
C、where; improving
D、when; improving
答案A
解析
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