I
1, it -> bỏ
2, who his -> whose
3, which -> whom
4, in it -> bỏ
5, living -> live
6, who he -> who
7, about who -> about whom
8, in where -> in which
II
1, I don’t like stories which have unhappy endings.
2, The books that are on the table belong to Ann.
3, Some documents which were stolen from a car have been found.
4, He works for a computer magazine which is very popular in Mexico.
5, He was born on the day on which his father was away.
6, The airport which we’re going to arrive at is the most modern one.
7, The movie which they are talking about is fantastic.
Chúc bạn sức khỏe và học tốt nhé!