1. You have to make sure children do not play with matches.

2. My father ought to be on a diet because he is quite fat.

3.Why mustn't we let children play in the kitchen?

4. He spends his free time doing volumteer work at a local orphanage.

5. A customer telephoned the T.L.D.S just before midday on May 12.

6. (đề không rõ)

7. You have to keep all dangerous objects out of the children's reach.

8.Children often receive a lot of presents on Tet holiday. 

1.dangerous

2.safely

3.emigrates

4.dangerous

5.successful

6. generous

7. electicity

8. humorous

9. extremly 

10. safe

11. exhibition

12. differently

13. unsuitable

14. uncountable

15. inventor

16. electricity

17. arrangement

18. destroys

19. annoy

20.safer

21. wisdom

22. immediately

23. electricity