Visitors today is more than yesterday.yesterday前为什么不加that?）

Today’s weather is worse than that yesterday.为什么要加that it was hotter yesterday为什么yesterday前面不加than Today is warmer than yesterday the weather today is warmer than that yesterday today is warmer than yesterday is I think today is （sun） than yesterday. It is __ colder today than yesterday. Today is less warmer than yesterday.改错 it is-----------(sun)today than yesterday tom is _____(busy) today than yesterday. Today is much ____ (cloud) than yesterday. today is ____ (warm) than yesterday