1. Lan has been studying English for 5 years
2. Although the sun was shining, it wasn't very warm
3. Nam used to live with his parents
4. You should not talk with food in your mouth
5. I prefer traditional dances to modern ones
 II/
1. Dogs can swim better than cats
2. Minh really enjoys hanging out with friends
3. It is interesting to play beach games
4. He spends his free time looking after his garden
5. Do you mind changing this T-shirt for me?