题目内容:
Paragraph 6 ____________
A.Planes bring people even closer. B.People can travel all over the world.
C.Automobiles promote farming.
D.Railroads unite the whole country.
E.Building railroads is costly.
F.Transportation makes it possible for workers to move out of cities.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: