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Ex1
3 There was a lot of noise from the street, so we had to close the window.
4 Karen can't stay for the whole meeting; she has to leave early.
5 How old do you have to be to drive in your country?
6 I don't have much time; I have to hurry.
7 How is Paul enjoying his new job? Does he have to travel a lot?
8 "I'm afraid I can't stay long." - "What time do you have to go?"
9 "The bus was late again." - "How long did you have to wait?"
10 There was nobody to help me. I had to do everything by myself.
Ex 4
3 I can stay in bed tomorrow morning because I don't have to go to work.
4 Whatever you do, you mustn't touch that switch. It's very dangerous.
5 There's a lift in the building, so we don't have to climb the stairs.
6 You mustn't forget what I told you. It's very important.
7 Sue doesn't have to get up early, but sheusually does.
8 Don't make so much noise. We mustn't wake the children.
9 I mustn't eat too much. I'm supposed to be on a diet.
10 You don't have to be a good player to enjoy a game oftennis.
The writer's opinion is that the lack of exercise in teenagers' lives is a serious problem, caused by spending too much time on electronic gadgets and being overweight.
(Ý kiến của người viết là việc thiếu tập thể dục trong cuộc sống của thanh thiếu niên là một vấn đề nghiêm trọng, gây ra bởi việc dành quá nhiều thời gian cho các thiết bị điện tử và thừa cân.)
The writer proposes two solutions:
(Người viết đề xuất hai giải pháp)
- Making sure school canteens only serve healthy food.
(Đảm bảo căng tin trường học chỉ phục vụ thức ăn lành mạnh.)
- Giving all teenagers free membership of their local sports facilities.
(Cho tất cả thanh thiếu niên trở thành thành viên miễn phí của các cơ sở thể thao địa phương.)
Healthy lifestyle
I usually do exercises like jogging, cycling and some light workouts at home to keep fit because they help me stay active and healthyI often eat vegetables, fruits, rice and drink plenty of water, sometimes I also drink milk or fresh juice to stay healthyCities of the future
People will travel by electric cars, high speed trains and maybe flying vehicles because they are faster and more convenientCities of the future can be better for the environment by using renewable energy, planting more trees and reducing pollutionClimate change
We can reduce carbon emissions by using public transport, saving electricity and using clean energy like solar or wind powerWe can reduce waste by recycling, reusing items and avoiding single use plastics