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A/ Phần nghe
B/
I/
1. Scientific : nhấn âm 3
2. Historical : nhấn âm 2
3. degree : nhấn âm 2
4. impolite : nhấn âm 3
II/
1. C /t/ còn lại /d/
2. C polluted
3. A for
4. D Oh no!

III/
1. would you do
2. to stay
3. had managed 
4. will be having

C/
I/
1. communicate
2. Because of
3. international
4. fast

II/
1. Air pollution.
2. Smoke comes from factories.
3. Yes, it can.
4. The gases from the exhausts of cars have also increased air pollution in most cities.
5. They cannot think as quickly as other children and they are clumsy when they use their hands.
6. Because the gases in the atmosphere continue to increase.

D/
I/
1. If you take more exercises, you will get fit.
2. If I had much money now, I would buy a house in PhuCuong.
3. Mr.Minh said to me that I was not allowed to open the laboratory that day.
4. Marty asked Kim if he would send her an e-mail.
5. Unless you give me a hand, I can't finish this task.

II/

II/
1. Noise pollution is any loud sounds that are either harmful or annoying to humans and animals.
2. Generally, noise is produced by household appliances, big trucks, vehicles and motorbikes on the road, planes and helicopters flying over cities, loud speakers, etc.
3. Noise pollution can cause stress, illness, hearing loss, sleep loss and lost productivity.
4. Besides, health effects of noise include anxiety, stress, headaches, irritability and nervousness.
5. In my opinion, noise-producing industries, airports, bus terminals should be located far from living places.