1. My sister teach english at a school in the countryside.
=> Lỗi sai: teach. Sửa: teaches
2. It takes they three hours doing his homework everyday.
=> Lỗi sai: they. Sửa lỗi: them
3. What an expensive hats.
=> Lỗi sai: an. Sửa lỗi: bỏ an
4. How many does it cost to send this letter to chaina.
=> Lỗi sai: how many. Sửa lỗi: How much
5. Marry is from france. She speaks france.
=> Lỗi sai: france(câu sau). Sửa lỗi: french
6. My father has less days-off than tim's father. => Lỗi: less => fewer
7. She spent two hours to do her homework last night.
=> Lỗi to do => doing
8. Hoa playing the piano in her room at the moment.
=> Lỗi: playing => is playing
9. Let I tell you something about my family.
=> Lỗi: I => me
10. Does nam's mother go always to work by bus.
=> Lỗi: go always => always go