◎ 题干
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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“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. wher…”主要考查了你对  【不定式的被动式】【同位语从句】  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。