: Một vật AB cao 2cm đặt vuông góc với trục chính của TKHT có tiêu cự 8cm và cách TK 26cm.

If I ……….a lot of money now, I would buy  a new car.

a. have b. have c. had d. had had

2. If I were you, I …………….do that.

a. won’t b. wouldn’t c. weren’t d. shan’t

3. If I were offered the job, I think I ………. it.

a. take    b. will take     c. would take d. would have taken.

4. I would be very surprised if he……………..my invitation

a. refuses b. refused    c. had refused d. would refuse.

5. Many people would be out of work if that factory…….. down.

a. closes b. had closed c. closed d. would close.

6. 6. If she sold her car, she ………… much money.

a. gets b. would get   c. will get d. would have got.

7. They would be disappointed if we…………….there

a. hadn’t come b. wouldn’t come c. don’t come d. didn’t come.

8. Would John be angry if I ……. ……his bicycle without asking?

a. take b. took c. had taken d. would take.

9. She ……….terrible upset if I lost this ring.

a. will be b. would be c. were d. had been.

10. If someone …… in here with a gun, I would be very frightened.

a. would walk b. walks c. had walked d. walked.

11. What would happen if you ……………..to work tomorrow?

a. don’t go b. didn’t go    c. won’t go d. wouldn’t go.

12. We’ll get wet if we ………….out.

a. go b. did go c. went d. had gone.

13. If I go shopping, I ……… some food.

a. buy   b. will buy   c. would buy d. would have bought.

14. If I find it, I ………you.

a. will tell b. would tell c. had told d. told.

15. What would you do if you……………a million dollars?

a. would win b. win c. had won d. won.

16. They’d be hurt if I ……………….

a. don’t go  b. didn’t go c. hadn’t gone d. wouldn’t go.

17. If we took the 6: 30 train, we ………… too early.

a. would have arrived    b. arrived    

c. will arrived   d. would arrive.

18. If I had known you were in hospital, I …………to see you.

a. will go b. would go  c. went d. would have gone.

19. You won’t pass the examination……………you study more.

a. as long as b. unless c. if d. whether.

*Unless= If ….. not

20. If I were to leave my country , I ……………disappointed.

a. probably be b. would have been   c. will be d. would be.

Câu 37: Đốt cháy 4,6 gam CzH5OH, khối lượng CO2 sinh ra là A. 4,4g B. 8,8g C. 17,4g D. 22g

Câu 40: Pha 200ml rượu 45° với 300ml rượu 60, độ rượu sau khi pha là
A. 45⁰
B. 50⁰
C. 54°
D. 55⁰