单选题   There is a new problem involved in the popularity of private cars ______ road condition needs ______.
 
【正确答案】 A
【答案解析】考查名词性从句 此处“道路条件需要改善”为problem的同位语从句，用that引导；在need, want, require, deserve等动词后，可用-ing分词的主动形式表被动，也可用不定式的被动态，所以“道路条件需要改善”为：The road condition needs improving. 或者The road condition needs to be improved. 故选A。