1. Lan has been stuyding English for 5 years
2. Although the sun is shinning, it wasn't very warm
3. Nam used to live with his parent
4. You should never talk with food in your mouth
5. I prefer traditional dances to moderns one
6. We usually hear our grandmother telling folk tales
7. Although it was raining heavily, farmers went on working on their farms
8. I usually get help in math by Nam
9. My father used to smoke
10. Mr Lam has been workingin this factory for five year
11. You should never pick food out of you teeth with your finger nails
12. Mai prefer traditional dances to modern ones