改病句In the past,the travelling in Shanghai were buse.were buse错了,应该为什么?改病句Nowadays,the travelling in Shanghai is buses,taxis,undergrounds.buses,taxis,undergrounds错了,应该为什么?
问题描述：
改病句In the past,the travelling in Shanghai were buse.were buse错了,应该为什么?
改病句Nowadays,the travelling in Shanghai is buses,taxis,undergrounds.
buses,taxis,undergrounds错了,应该为什么?
答