* Combine two sentences into one. Use the sentence in brackets to make a non-defining relative clause.
1. The National Library opens every weekday. (The library is on the second floor).
The National Library, which is on the second floor, opens every weekday.
2. Developed countries are helping developing countries. (They are ahead in education and wealth.)
Developed countries, which are ahead in education and wealth, are helping developing countries.
3. Internationalisation has brought about both opportunities and challenges. (It started 15 years ago.)
Internationalsation, which started 15 years ago, has brought about both opportunities and challenges.
4. Smartphones will be used widely in school to support learning. (They help students to write scripts and make videos.)
Smartphones, which help students to write scripts and make videos, will be used widely in school to support learning.
5. Jack London wrote internationally famous novels like Call of the Wild and White Fang. (He is an American writer.)
Jack London, who is an American writer, wrote internationally famous novels like Call of the Wild and White Fang.
6. Have you ever heard about Captain James Cook? (He mapped a lot of places in the world, including Australia and New Zealand).
Have you ever heard about Captain James Cook, who mapped a lot of places in the world, including Australia and New Zealand?

Combine these pairs of sentences. Use a relative pronoun only when necessary. Use commas for non-defining relative clause.
1.  I bought a cell phone. I can use it to send and receive e-mail.
     __________________________________________________________________________________
2. My new cell phone has become a necessary part of life. I only bought it a month ago.
    __________________________________________________________________________________
    __________________________________________________________________________________
3. My roommate has never been on the Internet. She is afraid of computers.
    __________________________________________________________________________________
4. Now, there are psychologists. They help technophobes use technology.
    __________________________________________________________________________________
5. A lot of people suffer from technostress. Those people work in my office.
    __________________________________________________________________________________
6. Some people dream of a job. They can do the job without technology.
    __________________________________________________________________________________
7. Graham took us to his office. It was filled with books.
    à The office _______________________________________________________________________
8. The man is a computer expert. You were talking to him.
    __________________________________________________________________________________
9. Some documents have been found. They were stolen from a car.
    __________________________________________________________________________________
10. Dr. Michelle Weil wrote a book about 'technostress'. She is a psychologist.
    __________________________________________________________________________________
11. He works for a computer magazine. The magazine is very popular in Mexico.
    __________________________________________________________________________________
12. I saw several houses. Most of them were quite unsuitable.
    __________________________________________________________________________________
13. My stereo doesn't work today. It worked yesterday.
    __________________________________________________________________________________
14. Marta has a brother. Her brother's name is Manuel.
    __________________________________________________________________________________
15. My English teacher, Mrs. Brookes, was someone. I had great respect for him.
    __________________________________________________________________________________

 Rewrite the pairs of sentences as one sentence using a defining or non-defining relative clause. 

1 I work for a man. The man’s farm covers thousands of acres.

I work ……………………………………………………………………………………………………………………

2. The spacecraft is called Vostok 3KA. It took Yuri Gagarin into space.

The spacecraft ……………………………………………………………………………………………………………

3. She likes her father’s career. Her father pursued this career all his life.

She likes …………………………………………………………………………………………………………………

4. He admires the teacher. That teacher initiated building the school library.

He admires ………………………………………………………………………………………………………………

5. My grandfather used to be an astronaut. He has been retired for ten years now.

My grandfather……………………………………………………………………………………………………………

6. Students will have to make their own learning decisions. This will be hard for many of them.
Students …………………………………………………………………………………………………………………

Combine the sentences, using who, whom, which or whose. (cẩn thận những câu là "Non-defining relative clauses" thì nhớ phải thêm dấu phẩy):

27. Those documents have been found. They were stolen from a car.

-> .............................................................................

28. He works for this computer magazine. The magazine is very popular in Mexico.

-> .............................................................................

Combine the sentences, using who, whom, which or whose. (cẩn thận những câu là "Non-defining relative clauses" thì nhớ phải thêm dấu phẩy):

27. Those documents have been found. They were stolen from a car.

-> .............................................................................

28. He works for this computer magazine. The magazine is very popular in Mexico.

-> .............................................................................

29. The man called the police. His wallet was stolen.

-> .............................................................................

30. The people were nice. We visit their house.

-> .............................................................................

VII.Make a defining relative clause from the two sentences.
1. Social media networks are an excellent tool. You can use them to promote your business.
____________________________________________________________________________
2. You can buy the pasta from that Italian shop. It has just opened in the high street.
____________________________________________________________________________
3. I‟ll call the students. I went to London with them last summer.
____________________________________________________________________________
4. That‟s the hotel. We stayed there for our honeymoon.
____________________________________________________________________________
5. I couldn‟t find the man. I‟d taken his case by mistake.
____________________________________________________________________________
6. Jeanny phoned me yesterday. I was in conference with my clients then.
____________________________________________________________________________
7. The tree only grows in the rainforest. This drug is obtained from it.
____________________________________________________________________________
8. People often have very little money to spend on leisure. They have a lot of leisure time.
____________________________________________________________________________
9. His refusal to tell her the truth is the reason. That‟s why she is so angry with him.
____________________________________________________________________________
10. We haven‟t seen the friends for ten years. They are coming to visit us this weekend.
__________________________________________________________________________
 

Make a non - defining relative clause from the two sentences:
1. Catherine ruled Russia for over 30 years. She made many important changes.
-> 
2. The woman next door is moving next month. I met her for the first time last week.
-> 
3. Starbucks wants to open new stores in China. It does business all over the world. 
-> 
4. I met Julie in the Italian restaurant. She was working as a waitress there.
-> 
5. The Games International Company has just gone bankrupt. We have done business with them for many years.
-> 
6. Our professor of psychology has written some very interesting books. I always attend her lectures.
-> 
7. Jane has decided to go and teach abroad. It will be an interesting experience for her.
-> 
8. My two cousins are coming to visit next week. I have seen neither off them for ten years.
-> 
9. And then Mary walked in. We had been talking about her eariler.
-> 
10. The last time I went to Scotland was in May. The weather was very beatiful then.
->