I

1 She can't work hard because of being very old

2 He likes her because of her beauty.

3 Because of being careless, he broke the vase.

4 He left school because of his hard life.

5 I went to bed early because of feeling tired.

II

1 John used to smoke a lot of years.

2 It's time you went to school.

3 When did you last see Tom?

4 I'd rather you to keep silent in the classroom.

5 He wishes he could pass the examination.

6 We wish we could go out.

7 I'd rather you not to come to class late.

8 I wish he could come here.

9 They used to go to VT at the weekends.

10 If only I could help you.

11 We started to learn El 4 years ago.

12 My father has given up smoking since last year.

13 They started to work in that factory in 2011.

14 The last time I saw her was 4 years ago.

15 How long ago did you start learning French?

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III: 2. Because she was sick, she went to bed early

3. Because they weather was lovely, we spent the whole day

4. Because I am short, I can't play basketball

5. Because the water is highly polluted, we can't swim in this part of the river

IV: 1. She can't work hard because of being very old

2. He likes her because of her beauty

3. Because of his carelessness, he broke the vase

4. He left school because of his hard life

5. I went to bed early because of my tiredness

V:1. John used to smoke a lot of years

2. It's time you went to school

3. When did you last see Tom?

4. I'd rather you keep silent in the classroom

5. He wishes he could pass the examination

6. We wish we could go out

7. I'd rather you not come to class late

8. I wish he could come here

9. They used to go to Vung Tau at the weekends

10. If only I could help you

11. We started learning english 4 years ago

12. My father has given up smoking since last year

13. They started working in that factory in 2011

14. The last time I saw her was 4 years ago

15. How long ago did you start to learn French?