Articles I. Indefinite articles: A/AN

2. A/ An không được dùng:

- ONE được sử dụng thay A/An để nhấn mạnh.	Ex: There is a book on the table, but one is not enough.
- Trước danh từ không đếm được.	Ex: Coffee is also a kind of drink.
- Trước các danh từ đếm được số nhiều.	Ex: Dogs are faithful animals.

II. DEFINITE ARTICLE: THE

1. THE được dùng trước:

- Những vật duy nhất.	Ex: the sun, the moon, the world....
- Các danh từ được xác nhận bởi cụm tính từ hoặc mệnh đề tính từ.	- The house with green fence is hers. - The man that we met has just come.
- Các danh từ được xác định qua ngữ cảnh hoặc được đề cập trước đó.	Ex: Finally, the writer killed himself. - I have a book and an eraser. The book is now on the table.
- Các danh từ chỉ sự giải trí.	Ex: the theater, the concert, the church
- Trước tên các tàu thuyền, máy bay.	Ex: The Titanic was a great ship.
- Các sông, biển, đại dương, dãy núi.	Ex: the Mekong River, the East Sea, the Pacific Ocean, the Himalayas
- Một nhóm các đảo hoặc quốc gia.	Ex: the Philippines, the United States.
- Tính từ dùng như danh từ tập hợp.	Ex: You should help the poor.
- Trong so sánh nhất.	Ex: Nam is the cleverest in his class.
- Tên người ở số nhiều (chỉ gia đình)	Ex: The Blacks, The Blues, the Nams
- Các danh từ đại diện cho 1 loài.	Ex: The cat is a lovely home pet.
- Các trạng từ chỉ thời gian, nơi chốn.	Ex: in the morning, in the street, in the water.....
- Số thứ tự.	Ex: the first, the second, the third....
- Chuỗi thời gian hoặc không gian.	Ex: the next, the following, the last...

2. THE không dùng được:

- Trước các danh từ số nhiều nói chung.	Ex: They build houses near the hall.
- Danh từ trừu tượng, không đếm được.	Ex: Independence is a happy thing.
- Các danh từ chỉ màu sắc.	Ex: Red and white make pink.
- Các môn học.	Ex: Math is her worst subject.
- Các vật liệu, kim loại.	Ex: Steel is made from iron.
- Các tên nước, châu lục, thành phố.	Ex: Ha Noi is the capital of Vietnam.
- Các chức danh, tên người.	Ex: President Bill Clinton, Ba, Nga.
- Các bữa ăn, món ăn, thức ăn.	Ex: We have rice and fish for dinner.
- Các trò chơi, thể thao.	Ex: Football is a popular sport in Vietnam.
- Các loại bệnh tật.	Ex: Cold is a common disease.
- Ngôn ngữ, tiếng nói.	Ex: English is being used everywhere.
- Các kỳ nghỉ, lễ hội.	Ex: Tet, Christmas, Valentine...
- Các mũi đất (nhô ra biển, hồ, núi)	Ex: Cape Horn, Lake Than Tho, Mount Cam, Mount Rushmore..... *But: the Cape of Good Hope, the Great Lake, the Mount of Olive......

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I. Put a/ an, the or  to complete the following sentences.

1. I’m sorry. I didn’t mean to do that. It was _________ mistake.

2. There were no chairs, so we had to sit on _________ floor.

3. Lucy has just gotten ________ job in _______ bank in Chicago.

4. There’s _______ bookstore on ________ corner near my house.

5. It’s very cold in here. Can you close ________ window, please?

6. If you go past _____ post office, can you get me some stamps?

7. It was ________ very hot day. It was ________ hottest day of ________ year.

8. What’s ________ name of ________ woman who sat beside you at the dinner?

9. How often do you go to ________ movies?

10. “Can you tell me where ________ Room 306 is, please?” “It’s on ________ third floor.”

11. He lay down ________ ground and looked up at ________ sky.

12. You’ll find ________ information you need at ________ top of ________ page 24.

13. ________ moon goes around ________ earth every 27 days.

14. He doesn’t usually have ________ lunch, but he always eats ________ good breakfast.

15. If you live in ________ foreign country, you should try and learn ________ language.

16. ______ next train to Brighton leaves from _____ Platform 5.

17. Last year we visited _____ Canada and _______ United States.

18. ______ highest mountain in _____ Africa is _____ Kilimanjaro.

19. ________ Mediterranean Sea is the sea between ________ Africa and ________ Europe.

20. ________ Mississippi is ________ longest river in ________ North America.

21. I’m on night duty. When you go to ________ bed, I go to ________ work.

22. Sorry, I can’t find the number. I remember writing it on ________ back of an envelope.

23. ______ gold is perhaps _______ most highly treasured metal.

24. ______ Mekong River is ______ longest river in _________ VN

25. ________ winter is usually cold, but ________ winter of this year is warm.

26.When you go to ________ store, please buy________ bottle of________ chocolate milk and________ dozen oranges.

27. John and Mary went to________ school yesterday and then studied in________ library before returning home.

28. There are only________ few seats left for________ tonight’s musical at________ university.

29. ________ Lake Erie is one of ________ five Great Lakes in ________ North America.

30. What did you eat for ________ breakfast this morning?

31. Louie played ________ basketball and ________ baseball at ________ Boy’s Club this year.

32. Rita plays _______ violin and her sister plays ________ guitar.

33. David attended ________ Princeton University.

34. Harry has been admitted to ________ School of Medicine at ________ Midwestern university.

35. Phil can’t go to ________ movies tonight because he has to write ________ essay.

36. Last night there was ________ singing outside my house.

37. ________ chair which you are sitting in is broken.

38. ________ Florida State University is smaller than ________ University of Florida.

39. Scientists sent ________ expedition to ________ Mars during ________ 1990s.

40. Mel’s grandmother is in________ hospital, so we went to visit her________ last night.