一道英语选择题,选什么、 为什么?
—— no friction between the surface of the road and our feet,we could not walk at all.
A If there was B Were there
答案选的是A 、B为什么不对了.
没搞清楚的不要乱来一气 我承受能力不好 脑袋都给你们搞晕了。