中文谷Thereisanewprobleminvolvedinthepopularityofprivatecars
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问题详情：
There is a new problem involved in the popularity of private cars ____ road condition need ____ . A. that; to be improved B. which; to be improved C. where; to be improved D. when; improving
【回答】
A
知识点：连词
题型：选择题
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