单选题Car control is a top

问题补充：

单选题Carcontrolisatopic_________Beijingershavearguedforalongtime.A.with whichB.whichC.about whichD.in that

答案：

C解析本题考查定语从句。argue with sb about sth 与某人争论某事。topic是先行词，是争论的内容，所以选C