英语定语从句 初三

I come from a country?Its history goes back thousands of years?
I come from a country whose history goes back thousands of years 正解
The country whose history goes back thousands of years I come from 对吗?
错.把定语拿掉,The country I come from,这是错的,所以错
The man was very kind?I talked to him yesterday?
The man who I talked to yesterday was very kind?正解
The man whose I talked to yesterday was very kind?
为什么是 宾格?求正解
错,whose错误
I must thank the people?I got a present from him?
I must thank the people who I got a present from正解
为什不是I must thank the people whom I got a present from 为什么不是宾格
定语从句不用whom