1. which -> who

2. was nice that I met at the party -> that I met at the party was nice

3. measures -> measuring

4. it -> bỏ

5. who -> whose

6. house opposite -> opposite house

7. teachers -> teaching

8. was very angry who his car was stolen -> whose car was stolen was very angry

9. is producing fruit that we planted it last year -> that we planted last year is producing fruit

10. I stayed at their house last summer. -> whose house I stayed at last summer

2. the woman was nice that i met at the party
That-who
3. a clock is an instrument measures time
Measures-measuring
4. the book that i bought it at the bookfair is very interesting
That-which
5. i met a woman who her husband is a famous doctor
Who-whose
6. do you know the people who lives in the house oppsite?
Lives-live
7. the professor teaches vietnamese literature is very good
Teaches-teaching
8. that man was very angry who his car was stolen
Who his-whose
9. the apple tree is producing fruit that we planted it last year
That-which
It-0
10. i wrote a thank you note to the people i stayed at their house last summer
I wrote a thank you note to the people whose house I stayed at last summer.