1. We keep our bodies warm to avoid having a flu and a cold.
2. You shouldn't play more computer games in your free time.
3. Vitamins play an important role in our diet.
4. Getting enough sleep and rest will help you concentrate at school.
5. The doctor is asking Huy some questions about health problems.
6. That dog is not as dangerous as it looks.
7. Schools in Viet Nam are different from schools in the USA.