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Ex2/
2. Despite having much experience in machinenry, he didn't succeed in repairing this machine.
3. Despite the difficult test, we did it well.
4. Despite his strength, I'm not afraid of him.
5. In spite of the bad weather, the plane took off.
6. In spite of his bad English, he wasn't chosen.
7. In spite of the narrow streets, many people drive in this city.
8. Mr.Pike doesn't wear glasses despite being over sixty.
9. He ate the chocolate cake despite being on diet.
10. He studies very well although his life was hard at that time.

Ex3/
1. Because of being careful, she didn't make any mistakes in her answers.
2. I started to cough because of the smoke in the room.
3. We didn't go fishing because of the rough water.
4. Because of the difficult test, I couldn't do it.
5. Peter didn't go to school yesterday because of being sick.
6. Mary went to bed early because of feeling tired.
7. She didn't go to the circus with Betty because of haivng a bad cold.
8. John succeeded in his exam because of working hard.
9. She stayed at home because of her sick mother.
10. I like him because of his kind father.