题目内容:
听材料,回答下列问题:
A.The new technology used to build roads. B.The ability to transport,goods across the world.
C.The fast growing trade in grain and cotton.
D.The linking of local country roads into one。long road.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: