A, Tìm lỗi sai và sửa lại
1. Tim is at the same age as Hoa
2. At recess, the students practice to play basketball
3. Do you know how much a banana cost?
4. The teacher says Ba will be a famous artist in one day
5. Some boys are playing marble in the school yard at recess
6. Some students are playing games as blind man's buff and catch
7. Mai learns how to use a computer in her sciencetific class
8. I'd love coming to your birthday but I'm much too busy
9. There are less TV programs for teenagers than there are for adults
10. People are living longer so there are more many old people
B, Tìm lỗi sai và sửa lại
The world cuts up more than a millions trees every year to make paper and paper products. In the USA, each person using about 300 kilograms of paper each year. In Europe, the finger is 200 kilograms of paper each year. It takes two ton of wood and 200,000 liters of water to making a ton of paper. About thirty per cent of our rubish is paper and paper products. It is stupid and wasteful to dump them. Paper on rubish dumps does not do somebody any good. It decays and...
1.At => bỏ
2.To play => playing
3.Cost => costs
4. In one day => one day
5.marble => marbles
6. As => like
7. Sciencetific => science
8. Coming => to come
9. Less => fewer
10.many => bỏ
A, Tìm lỗi sai và sửa lại:
1. at -> bỏ.
2. to play -> playing.
3. cost -> costs.
4. in one day -> one day.
5. marble -> marbles.
6. as -> like.
7. scientific -> computer science.
8. coming -> to come.
9. less -> fewer.
10. many -> bỏ.
Chúc bạn học tốt! 
1.At => bỏ
2.To play => playing
3.Cost => costs
4. In one day => one day
5.marble => marbles
6. As => like
7. Sciencetific => science
8. Coming => to come
9. Less => fewer
10.many => bỏ