VI. Each of the following sentences has a mistake. Underline the mistake and correct it:

1. We spent a ten – days vacation in Phong Nha last July. ........................................

2. Does your sister have more or less vacation than you ? .......................................

3. The public library in the city has thousand of good books. .........................................

4. It takes me about fifteen minutes going to school by bicycle. .......................................

5. Mary is the most beautiful of the twins. .........................................

6. You look tired. You’d better staying inside at recess. ..........................................

7. My sister likes badminton but she doesn’t play it very good. ........................................

8. Minh enjoys to play volleyball in his free time. .......................................

9. She bought some souvenirs from the shop and so was I. ........................................

10. At present I live on 12 Tran Hung Dao Street. ......................................