I. Choose the best answer to complete the following sentences.
1. Fruits are very useful (for/to/in/about) our health.
2. My sister is a very (cooker/cook/cooking/cooked).
3. I felt (tire/tiring/tired/happily) after a hard working.
4. What (so good/such good/a good/good) advice she gave us!
5. “I’m sorry about that!” – “That’s right/Of course/It’s OK/You’re welcome)!”.
6. The country is (getting/going/changing/doing) busier and noisier.
7. After a month, Hoa got used to (studying/study/studied/is studying) in her new school.
8. Would you mind if I (smoking/smoke/smoked/to smoke) in the room ?
9. Have you got a car (of your own/of yourself/of you/of your)?
10. The number of high buildings (is/are/have/has) risen.