1. Despite / In spite of  not being an intelligent student, he can learn very fast.

2. Because of Hoa’s richness, she could buy that house.

3. Because of  the heavy rain, I couldn't go to school.

4. Because of his sickness  his father asked him to go stay at home.

5. Because of an accident, I was late.

6. She failed the University entrance exam because of  her bad grades .

7. Despite his physical handicap, he has become a successful business man.

8. Because the price is cheap, my wife insists on buying the Tivi.

9. Despite / In spite of the heavy rain, we still went to school.

10. Because of studying hard , I passed the exam.

III.1 because the room was dark I turned the lights on

2 she was lazy so she didn't work well at school

3 he was tired but he tried to finish the report before going to bed

4 they didn't get good marks but they didn't feel sad or worried 

5 it rained heavily so I arrived late