Câu 7:Trong các dãy công thức hóa học sau, dãy nào hoàn toàn là công thức hóa học của hợp chất ?

A. H₂O,O₂, NaOH     B. Na₂O,KOH, NaCl            

C.Cu, Br₂, H₂             D. Cl₂, CaO, N₂

* Choose the correct answers.

1. A: .................... is the weathergirl on VTV3 at 8 o’clock tonight?

B: She is Hoai Anh.

A. Who B. What C. When D. Why

2. A: .................... is the studio of Vietnam Television?

B: In Hanoi.

A. When B. Where C.Why D. How

3. A: .................... do you watch this TV programme?

B: Three times a week.

A. When B. How often C. How long D. How much

4. A: .................... have we watched this programme?

B: About one year.

A. When B. How often C. How long D. How much

5. A: .................... televisions are there in your house?

B: There are two televisions in my house.

A. How many B. How much C. How long D. How often

6. A: .................... will you buy a new television?

B: Maybe tomorrow.

A. Why B. Where C. When D. How

7. My parents have ................. cat and a dog. The dog never bites _____ cat.

A. a/ a B. a/ the C. the/ the D. the/ a

8. We live in ................. old house in ................. countryside.

A. an/ a B. an/ the C. the/ the D. the/ a

9. Nam is ………………. most intelligent in my class.

A. a B. an C. the D. x

10. Chickens, ducks and geese are ……………

A. cattle B. animals

C. poultry D. people

11. People often grow other crops on ……………… land.

A. burnt – down B. burn – out C. burn – up D. burn – in

12. The typical house type of the ethnic minority peoples is the ……………… house.

A. steel B. concrete C. cottage D. stilt

13. Gathering and hunting still play a(an)………….. role in the economy of the Laha.

A. insignificant B. important C. simple D. traditional

14. Vietnam has a lot of UNESCO – recognized ………………, including both tangible and intangible heritages.

A. heritage site B. heritage place C. heritages sites D. heritages places

15. People in some far-away mountainous regions still keep their ………….. way of life.

A. insignificant B. important C. simple D. traditional

16. “Simple” # …………….

A. insignificant B. poor C. developed D. complicated

17. “Developed” # ……………………………

A. insignificant B. important C. simple D. traditional

18. It’s a beautiful day. Let’s sit in ............... garden.

A. a B. an C. the D. A&C

19. My aunt lives in ............ old house in ............ small village

A. a/an B. an/a C. a/ the D. the/a

20. The ………………….. of the Thai people is unique and colorful.

A. custom B. house C. costume D. village