I. Fill in the blanks with relative pronouns.

1. Whales and dolphin both make sounds____ in some ways are similar to a language.

2. People_____ work with dolphin are often surprised at how intelligent they are.

3. One scientist_____ has studied dolphins carefully is John Lilly.

4. Lilly was the director of an institute_____ became famous for its research.

5. Another person_____ work has become well known is Roger Fouts.

6. Fouts, _____ has studied the behaviors of other animals, taught a chimpanzee sign language.

7. This is the kind of language_____ is used by deaf and dumb people.

8. “ Dumb” is the word in English for someone____ is unable to speak.

9. My father, ___ is a doctor, is fifty years old now.

10. The place_____ I went to school is a quiet town.

11. My brother, _____ has a moustache, is studying architecture.

12. The man_____ I saw on TV is a famous writer.

13. The day______ we left on our trip was Friday 13^th.

14. The time_____ I broke my leg is one of my worst memories.

15. The Hotel Tyrol, _____ I stayed when I was in Italy, was a really nice hotel.

16. I’m working for a firm, ______ main office is in London.

17. The work________ increases a lot when the boss is away is always interesting.

17. I don’t like people______ are big headed.

18. We went back to look at the house______ we used to live.

19. I live in Nam Dinh, ____ is one hundred kilometer from Ha Noi.

20. She wanted to know the reason ______ I had turned down her invitation.

21. It was returned to the person_____ name was inside.

22. Can you think of any reason____ he might have done it?

23. I prefer to go to Spain in winter, ____ there are fewer tourists about.

24. What is the name of the singer______ record is number one just now?