定语从句的问题：改正下列句中的错误
1.Who's the man you just talked to him ----------
2.Do you still remember the day when we spent together in China last year?-------
3.The book you lent it to me yeaterday was very interesting .---------
4.We were interested in the things and people whom we saw during the trip.---------
5.He is the man whose his wife died last year.------------
6.This is the factory where I want to visit .---------
7.We will do all what we can to help you out.--------