◎ 题干
There is a new problem________in the popularity of private cars that road conditions need improving..
[     ]
A.involved  
B.to involve
C.involving  
D.being involved
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“There is a new problem________in the popularity of private cars that road conditions need improving..[ ]A.involvedB.to involveC.involvingD.being involved…”主要考查了你对  【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。