3. I am better at English than Nam.
4. There are a lot of cafes, restaurants and museums in the Old Town.
5. Phong is the most intelligent (student) in the class.
6. If there is noise pollution, people and animals will have hearing problems.
7. Because Lan was sick, she didn't go to school.
8. My grandmother is the oldest in my family.
9. We have learnt English since we were in grade 3.