1. The policeman who stopped our car wasn't very friendly.
2. I don't know the name of the woman who i met yesterday.
3. The story Tom tells them are usually very funny.
4. The postman who is nearly always on time  was late this morning.
5.  We are visiting the children whose parents died in the storm.
6. I have a lot of homework which i must do.
7. Do you know the boy who borrowed that book?
8. The lady whose son went on a picnic with us last weekend is a teacher at our school.
9. Mary is the girl who was wearing the most fashionable dress.
10. Bien Hoa which is my hometown is nice.
11. Did you enjoy the party where you went to?
12. Alexander Fleming who discovered penicillin received the Nobel Prize in 1945.
13. Most of the people who i invited to the party couldn't come.
14. Peter who i had seen before wasnt at the party 
15. The woman who i wanted to see was away on holiday.
16. Why does she always wear clothes which are too small for her?
17. The fish we had for dinner was really delicious.
18. John whose grades are the highest in the school received a scholarship.
19. Hoan Kiem Lake whose water is always blue is a historical place.
20. Summer is the time when we have a lot of recreations.