1. A year has twelve months.
- There are .twelve months a year........
2. Lan is more intelligent than heroin sister.
-Lan's sister isn't .as intelligent as Lan.....
3. He looks after the sick people.
- He takes ..care of sick people.......
4. Do you enjoy listening to music?
- Are you interested ...in music?....
5. We have a two - month summer vacation.
- Our summer vacation lasts ....for two months....
6. Remember to write a letter to me.
-Don't ..forget to write a letter for me.......
7. Vietnamese students have fewer vacations than American ones.
- American students ....have longer vacations than Vietnamese ones.....
9. Hoa is a hard student.
- Hoa studies .hardly