VI:
1. many -> much
2. buying -> to buy
3. use -> used
4. buy -> bought
5. were you doing -> you were doing
IX:
1. We have lived here for 2 years.
2. I study English so as improve my knowledge.
3. Hoa was taught how to give first aids on the phone.
4. The heavy rain can cause the flood since it is dangerous.
5. Visitors are excited because of the beauty of London.
6. I practise speaking English every day so I can communicate with foreigners.
7. Annie's result is high because she studied hard.
8. Burning trees in this area can cause forest fire.
bài đúng hết nha, đánh giá 5 sao giúp mik với.