1/ Ø / a / the

2/ the 

3/ the / Ø

4/ the 

5/ Ø / Ø

6/ a / the

7/ the

8/ the / Ø

9/ the

10/ Ø

11/ the / the

12/ Ø

13/ the

14/ Ø

15/ the

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18/ Ø

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20/ the

1.After having a breakfast, we went out for a walk in a local park.

2. Watch out! Do not sit on the bench. It has been painted recently.

3. My father often takes me to the cinema on Sunday.

4. Yesterday the Prime Minister gave a speech in front of his people.

5. Bob is always staying in the bed until lunch time when he doesn’t have to go to the school.

6. My brother has got a new job and in a next few years he will live far from home.

7. Mr. Brown always water his trees in the morning. 8. In the future, I hope I have a chance to visit the Red Sea.

9. What has been done so far to protect the environment?

10. Our family has lived  Canada for 5 years. (câu này e k hiểu lắm, mong anh/chị thông cảm)

11.The Earth orbits around the Sun.

12.  The dogs are our best friends.

13. My mother used to be the most beautiful girt in her class.

14. Last year, a terrible storm reached the Philippines.

15. Many people mistake Rio de Janeiro for the capital of Brazil.

16. Many people migrate to the US in the hope of material success.

17. Do you have any ideas about the British Isles?

18. Yesterday I watched a documentary about the River Nile.

19. I know some people who have climb the Himalayas. 20. I want to do the housework on Sundays.