Đề : Make questions for the underlined part and change the give sentences into negative and interrogative form :

5. Your school has three floors and forty classes.

6. Her child does the housework in the evening.

7. Miss Lan goes to work by bus every morning.

8. Mr. Tuan occasionally, flies his airplane to New York.

9. We have lunch at the canteen of our school.

10. He has English on Wednesday, Thursday and Saturday.

11. Mai 's father works in the post office.

12. Khai and Song often play volleyball in the school yard.

13. Tet occurs in late January and early February.

14. Tidal waves, earthquakes and typhoons are natural disasters.

15. Thuy's Granma usually watches the weather forecast in the early morning.