Exercise 1: Fill in the blanks, using MUST or CAN’T

1. Why is that man looking around like that? He......must........  be lost.

2. That woman....can't.........  be a doctor! She looks far too young.

3. John always fails the tests, even though he's  clever. He....can't........  study enough.

4. The food is really good at that restaurant. They.....must........  have a great chef.

5. Who's that at the door? It ....can't............ be Susie - she'll still be at work now.

6. This ....must......... be John's house. This house has a red door and it's number 24, just like he said.

7. Julie ...must....... have much money or she would buy a new car. Her old one is falling apart.

8. He ......can't....... be at work now, can he? It's nearly midnight.

9. What a lot of lovely flowers you have! You...must....... really like gardening.

10. David......must.......  drink a lot of coffee. He's finished two packets already this week.

11. This .....can't....... be Jamie's coat. He's tall and this is tiny.

12. Her life _....can't......  be easy. She has four children and very little  money.

13. Where's Lucy? She _..must..........  be at the library, as she often goes there at this time.

14. This bill...can't........  be right! £50 for two cups of coffee!.

15. Emma's amazingly good at the piano. She...must.......  practise a lot.

16. The car in front is driving so slowly that  I think they must be looking for something.

17. You've already eaten enough for three people! You....must.......  still be hungry!.

18. This...must....... book  belong to the library. It's certainly not mine.

19. It only takes three hours to fly  from London to Sydney? That  _.must..... be correct!.

20. There....must.....  be something wrong with the fridge! It's making a very unusual noise.

11. advertisement

12. qualifications

13. national

14. poet

15. impractical

I.             Complete each sentence with appropriate verbs (mixed conditionals)
1. If he _had taken___ (take) the medication as prescribed, he wouldn't be lying sick in bed now.
2. If she'd taken reasonable precautions, she ____wouldn't be______ (not, be) pregnant now.
3. If he hadn't run after the car thief and had suffered a heart attack, he ___would probably live______(probably, live) alive today.
4. If you weren't such a poor dancer, you __would have gotten________ (get) a job in the chorus line in that musical.
5. I would have graduated if I __didn't have to______ (not, have) to look after my kids each day.
6. If I ___hadn't gotten_____ (not, get) the job in Tokyo, I ____would be____ (be) with my current partner.
7. My mum would be fine now if the doctor __had realized______ (realize) what was wrong with her at the beginning.
8. If you ___had started______ (start) studying earlier, you ‘d feel more prepared for the exam now.
9. If I ____had listened______ (listen) to your advice, I wouldn’t be in the mess now.
10. If I ___had been_____ (be) a good cook, I would have invited them to dinner.

1. fishing

2. loves

3. eating

4. watching

5. listening

6. doing

7. Have you visited

8. has sent

9. wrote

10. Did she finish

Cho hàm số y = f(x) liên tục trên R và có đồ thị như hình vẽ (dưới bình luận). Tìm tất cả các giá trị của tham số m để hàm số y= \(\left|f^2\left(x\right)-4f\left(x\right)+m\right|\) có 7 điểm cực trị (giải theo phương pháp ghép trục)

Chuyển sang câu bị động

5. I will present my ideas at the conference tonight.
→ ___My ideas will be presented at the conference tonight_____________________________________________________________________
6. He had written three books before 2000.
→ _____Three books had been written before 2000___________________________________________________________________
7. The Government is planning a new road near my house next year.
→ ______A new board is being planned near my house by the government next year__________________________________________________________________
8. Picasso was painting Guernica at that time.
→ ____Guernica was being painted by Picasso at that time____________________________________________________________________
9. By this time tomorrow, we will have signed the deal.
→ _____By this time tomorrow, the deal will have been signed___________________________________________________________________
10. People speak Portuguese in Brazil.
→ _____Portuguese is spoken in Brazil___________________________________________________________________
11. The traffic might delay Jimmy.
→ _____Jimmy might be delayed by the traffic___________________________________________________________________
12. Somebody should do the work for my mom.
→ ___the work should be done for my mom_____________________________________________________________________
13. They are building a new stadium near the station.
→ _____A new stadium is being built near the station___________________________________________________________________
14. John will tell you the truth later.
→ __You will be told the truth later______________________________________________________________________
15. Nobody drinks this kind of juice.
→ ___This kind of juice isn't drunk__________________________________________________________________
 

Hàm số y = log₂( 4^x- 2^x+ m) có tập xác định D= R khi nào?