- It was a nice day , so we went for a walk by the sea

-> Because..................................................................

- We didn't want to wake anybody up , so we came in very quiety

-> Since........................................................................

- We hadn't seen Lisa for a long time , so we didn't recognize her

-> As...........................................................................

- It's raining again , we will have to stay at home 

-> As.......................................................................

- Eva had an attractive personatily . She was very popular

-> Since.................................................................

- Lan has sense of humor . She is loved by many friends

-> Because..................................................

Ex.8. Combine each two sentences using the suggested word(s).

11. My foot was injured. I had to stay at home. (Because of)

 ________________________________________________________________

12. They have very little money. They aren’t happy. (As)

 ________________________________________________________________

13. I didn’t had an umbrella. I got very wet in the rain. (Because)

 ________________________________________________________________

14. I couldn’t sleep. I was tired. (So)

 ________________________________________________________________

15. He liked the sweater. He decided to buy it. (Therefore) ________________________________________________________________

16. I got the job. I had all the necessary qualifications. (Because) ________________________________________________________________

17. I had turned on the air conditioner. It was still hot in the room. (However)

 ________________________________________________________________

18. Laura wants to fly. She feels afraid. (But)

 ________________________________________________________________

19. Trevor didn’t notice the sign. It was right in front of him. (Although)

 ________________________________________________________________

20. I have improved at school, I didn’t feel happy. (Despite)

 ________________________________________________________________

JOIN EACH PAIR OF SENTENCES USING : because, as or since

1. He stopped the car. The traffic lights turned red.(because)

2. Jane didn't join our programme. She had to take a summer course.(as)

3.He behaved very rudely. Everyone dislike him.(since)

4. They like doing something useful. They do volunteer work.(because)

5. I won't be able to attend the meeting. I will be on holiday with my family ( since)

6.It was raining heavily. We decided to stay home and watch TV ( as)

7.He wants to get fit. He's training hard. ( because)

8. Sally was ill. She didn't go to school yesterday (since)

Combine each pair of sentences, using BECAUSE, SINCE, AS.

1. She saw the wanted man in a small coffee shop. She phoned the police.

2. The teacher is sick. We'll have no class tomorrow.

3. She walked slowly. Her leg was injured.

4. Mary looks happy. She has just got good marks.

5. He came to the office 10 minutes late. He missed the first bus.

6. She coughed and sneezed. The doctor said she had to stay out of crowd.

7. It got dark. I couldn't read the letter.

8. I didn't come in time. There was a traffic jam.

9. He stayed at home yesterday. His mother was sick.

10. We didn't want to go out. It rained heavily.

Combine these sentences using BECAUSE/ AS/ SINCE:
0. I’m going to the post office. I have some postccards to send
-> I’m going to the post office because/ as/ since  I have some postccards to send 
1. Jane was worried. She stayed at home alone.
………………………………………………………………………………………………………
2. Tom couldn’t get the job. He was not confident during the interview.
………………………………………………………………………………………………………
3. I have to work extra hours. I want to help support my family.
………………………………………………………………………………………………………
4. We adorehim. He is very talented.
………………………………………………………………………………………………………………………
5. She has to depend on us. She is an orphan.
………………………………………………………………………………………………………
6. I enjoy reading books. They help broaden my knowldege of the world.
………………………………………………………………………………………………………
7. Don’t believe him. He is always being a liar.
………………………………………………………………………………………………………
8. I haven’t finished my assighnment yet. I don’t have enough materials.
………………………………………………………………………………………………………
9. You must do it right now. It’s very urgent.
………………………………………………………………………………………………………
10. I feel atracted to her. Her voice is very sweet. 
………………………………………………………………………………………………………

1. The / taxi / me / driver / who / took / to / the airport / very / was / friendly/

.....................................................................................

2. The weather / very / bad, / was / so / we / stay/ to/ had / home / at / last / night

..................................................

3. If / she / money ,/ to/ will/ earns / fly/ lot / New York/ she / a / of / again.

............................................................................

V. Use the words and phrases to form the sentences.
1.some/ she / bought / last weekend / interesting book.
2. I/ love / basketball / volleyball/ watching/ and.
3. teacher/ dances/ English/ gracefully/ my/ very.
4. have to/ home/ I/ stay/ at/ because/ is/ raining/ it.
5. Vietnam/ because/ beautiful/ I/ it/ is/ love/ very.
6. born/ I/ in/ 1990/ was/ Viet Tri/ in.
7. English lessons/ and/ I/ on/ have/ Monday/ Tuesday.
8. We/ started/ ago/ have not finished/ the game/ half an hour / but / we/ / it.
9. They/ when/ it/ will/ stops/ for a walk/ raining/ go .
10. hasn’t / me/ since/ he/ Mr Minh/ called/ for/ left/ England/ his children/ live/ with/ to.

IV.Rewrite these sentences using the given word in brackets so that their meanings stay the same as the first ones.

38.   Although there was a traffic jam, I managed to arrive at the train station on time. (despite)

=> ……………………………………………………………………………………………

39.   The government will firmly control the over-exploitation of non-renewable energy sources. (be)

=> The over-exploitation ……………………………………………………………………

40.   They didn’t often go to the cinema every Sunday last year. (not use to)

=> ……………………………………………………………………………………………