7. Tom, who had been driving all day, was tired and wanted to stop.
8. The director to whom he gave forms passed them to his secretary.
10. Show me the thing which you are keeping in your hand.
12. We live near the river in which we can swim.
13. Here are some accounts that you have to check.
14. That is the school with was built in 1980.
15. This is Mrs. Jones whose son won the championship last year.
16. You can't enjoy hiking in Winter in which snow covers everything.
17. We'll take you to Dalat where you can enjoy fresh air.
18. Do they meet the boy who broke their window?
Đây là phần khá khó. Bạn tham khảo restrictitive và non-restrictitive clauses, relative pronouns as objects, possessive relative clauses và relative pronouns as objects of prepositions nha.