4.There is a new problem involved in the popularity of priva

问题描述:

4.There is a new problem involved in the popularity of private cars road conditions need ---------.
A.that; to be improved
B.which; to be improved
C.where; improving
D.when; improving
1个回答 分类:英语 2014-12-11

问题解答:

我来补答
A 同位语从句
 
 
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