1. They asked me a lot of question, which i couldn't answer most of.

2. Jill isn't answer the phone, which makes it difficult to contact her

3. Mr. Carter, whom I spoke on the phone last night, is very interested in our plan.

4. My computer, which I bought in Bac Giang in 2007, is expensive.

5. The man whom I respect most, is my father.

6. The man whose opinion I respect most, is my father.

7. We spent our holiday in Thailand last year, which is in the South East Asia.

8. The shirts which my sister bought for me, are too big.

9. Ho Chi Minh city, which is the most populous city in the country, is in the North of Viet Nam.

10. My dictionary, whose cover is blue, is not very good.

11. Linh Giang, whom we met yesterday, is my neighbor.

12. Tuan, whose uncle is a pilot, has just won the second prize in the English contest.

13. He failed the exam, which made his parents dissapointed.