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Bài 8.
1. and
2. but
3. so

4. but

5. or

6. but

7. or
8. so 
9. or
10. so
Bài 9
1. The bus stopped and the man got off.
2. Junk food tastes so good but it is bad for your health.
3. You should eat less junk food or you will put on your weight.
4. He is a vegetarian so he doesn't eat meat.
5. khó quá

6. Susan went to the park and she had a ride on the swmiming.

7. khó quá

8. There was a heavy rain so the roads were flooded.
Bài 10
1-c
2-f
3-d

4-g
5-a

6-g
@FbBinhne2k88

VIII. 

1. and

2. but

3. so

4. but

5. or

6. but

7. or

8. so

9. or

10. so

IX.

1. The bus stopped and the man got off.

2. Junk food tastes so good but it is bad for your health.

3. You should eat less junk food or you will put on your weight.

4. He is a vegetarian so he doesn't eat meat.

5. Would you like meat or vegetables for lunch?

6. Susan went to the park and she had a ride on the swing.

7. I love friuts but I am allergic to strawberries.

8. There was a heavy rain so the roads were flooded.

X.

1-c. The doctors advises him to relax more or he will be sick.

2-f. The Americans love steak. and they love hamburgers too.

3-d. Burgurs are very tasty, or you'll spoil the surprise.

4-b. My father likes tea, but I prefer coffee.

5-a. He was very hungry, so he ate all the cakes.

6-e. Sam went to the dentist's because he had a toothache.