why do you think cars have have changed our lives?给出2-3个简要的论点.从优缺点入手！

why do you think you 'Why do you think so?' why you think 和 why do you think的区别? why do you think people cheat? i do not why you think so? why do you think (so)对吗 why do you think so little missy? Why do you think B comes before Why do you think singing is fun why do you think it was built? do you think cat clever?why? Why do you think doctors are mean Do you think money is important?Why or why not? do you think criticism helps people improve?why (why not)? do you think shrek is ugly?why or why not? Why do you think so?Oh, xxx, why do you think so? Whose car do you think hit the oid 英语作文：What do you think owning a private car