[初三英语题,急!!

Who可以代替人，在从句中可以做主语。例：the girl who plays the piano is his daughter.
在从句中也可以做表语：He is no longer the man who he used to be

That可以代替人也可以代替物
代替人的时候，在从句中可以做主语：the man that is speaking is Jack
做宾语：is this the man that you talked about yesterday
做表语:she is no longer the girl that she was in her childhood

代替物的时候，在从句中可做主语：the train that has just left is for nanjing
作宾语：is this the photo that you took last summer?
做表语：my home town is not a polluted place that you think it to be

which可以代替物
作主语：the building which stands near the train station is a supermarket.
做宾语：the computer which i wanted to buy was sold out
做表语：she was fond of dancing,which her brother never was.

初三英语导航上有。