1. Ho Chi Minh city is the biggest city in Vietnam.
2. Motorbikes are faster than bikes.
3. Many boys and girls join the acting.
4. In most countries, there are organizations for teenagers.
5. Her English is better than my English.
6. Vietnamese students have a few vacations than American students.
7. Students feel happy and exciting during recess.
8. In Electronic, we learn to repair house appliances.
9. Mr. Tan works many hours than Mr. Nam.
10. Summer vacation is longer than the vacation of Vietnamese students