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Ex1/
1. In spite of having a good salary, he was unhappy in his job.
2. In spite of his broken leg, he managed to get out of the car.
3. Although Mr.Benson is old, he runs 7 miles before breakfast everyday.
4. In spite of being not experienced, she got the job.
5. Even though the flat is so noisy, we enjoy living there.
6. In spite of raining heavily, we went to the cinema.
7. Despite being sad, she smiled.
8. Despite being rich, Mr.David never helps the poor.
9. Because of being lazy, Nam couldn't pass the final exam.
10. Because the weather was bad, the students had to stay at home.

Ex3/
1. Tom is sick, but he must go to school today.
2. It rained heavily, so I didn't want to go out.
3. He is very tall and I am very tall.
4. You must study harder, or you will go into another class.
5. Because the air in the city is very polluted, people want to go to the countryside at the weekends.
6. I'm very tired because I stayed up late watching TV.
7. They want solar energy, but they don't have enough money to buy necessary equipment.
8. Mrs.Thanh wants to buy energy saving bulbs, but she doesn't know where to buy energy saving bulbs.