cho phương trình x²-2mx+4m-4=0

Tìm m để phương trình có 2 nghiệm x1, x2 phân biệt thỏa mãn x₁²+2mx₂

I. TAG QUESTIONS

31. Their’s parents are going to Hue,……………………………………..?

32 Ann couldn’t speak two years ago,…………………………………….?

33. You musn’t use this computer,…………………………………………….?

34. His mother is going to write poem,…………………………………………..?

35. Let’s tell them about it,………………………………….…. ?

36. The Brown;s children will have picnic next week,……………………………..?

37. Marry will be here soon,………………………………………………..?

38. This man can talk three foreign languages,……………………………….……..?

39. These men musn’t drive so fast,…………………………….......................?

40. Your sisters should try their best ,…………………………………..?

41. You’re tied,……………………………………..?

42. You’ve got a camera,…………………………………..………..?

43. Ann hasn’t got a pen,…………………………………..…………?

44. They didn’t lock their car,………………………………………?

45. Mai can’t speak German,………………………………………..?

46. You and he haven’t finished this novel,………………………..……….?

47. This isn’t interesting news,………………………………..……….?

48. He won’t mind if I use this phone,………………………………………..?

49. We would tell him ,…………………………………………………….?

50. Her parents are walking on the road,…………………………………..……..?

*SO / BECAUSE

1-She got up late. She didn’t go to school on time (because)

? …………………………………………………………….

2-He is tired. He has worked hard overnight (so)

? …………………………………………………………….

3-We decide to stay at home .The weather is bad. (because)

? …………………………………………………………….

4-My child has eaten a lot of candies. She has a toothache (so)

? …………………………………………………………….

5-Mr.Pike has an accident. He drives very carelessly (because)

? …………………………………………………………….

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Exercise 1: Put the verbs in brackets into the correct form:

1. If I see him , I _____ (give ) him a gift.

2. If I had a typewriter, I _____ (type) it myself.

3. If I knew that you are in hospital, I _____ (visit) you.

4. You could make better progress if you _____ (attend) class regularly.

5. If I _____ (know) his telephone number, I’d give it to you.

6. If you _____ (arrive) ten minutes earlier, you would have a seat.

7. If he worked more slowly, he _____ (not make) so many mistakes.

8. I shouldn’t drink that wine if I _____ (be) you.

9. If I _____ (find) a cheap room, I will stay a fortnight.

10. A lot of people _____ (be) out of work if the factory closes down.

Exercise 2: Make conditional sentences:

11. Keep silent or you’ll wake the baby up. →If ……………………………

12. Stop talking or you won’t understand the lesson.→ If ……………….…….

13. I don’t know her number, so I don’t ring her up.→ If …………

14. I don’t know the answer, so I can’t tell you.→ If ………

15. If we didn’t get up late , we would not miss the meeting.→ Unless

16. He would fail the test if he were lazy => Unless....

17. If Mai is not busy, she will come to the party => unless....

18. Unless Nam ate too much, he wouldn’t be over weight => If ....

19. Peter is fat because he eats so many chips. => If→…………………

Exercise 3. Chia động từ cho trong ngoặc

1. Mr Green always ( go) ……….to work by bus.

2. she said It ( not rain ) …………….the next day

3. They suggest that their parents ( have )…………….. lunch in the cafeteria now.

4. My teacher told me ( drink) …………… a lot of water every day.

5. Look ! The bus ( come)……….

6. the train (start) ………….in 10 minutes

7. There ( be) …………an English class in this room tomorrow evening.

8. What you ( do ) ………….. when you visit Japan ? – I ( buy ) …….. lots of souvenirs

9. The car looks so clean. You ( wash )………it?

10. How many languages ( speak) ........................ in the world now?
Giúp vs

I. Choose the word in each group that has the underlined part pronounced differently from the rest.

1. A. talked B. watched C. lived D. stopped

2. A. bomb B. debt C. describe D. doubt

3. A. teenage B. luggage C. image D. damage

4. A. thank B. they C. these D. than

5. A. walks B. cups C. students D. pens

II. Choose the best option (A, B, C or D) to complete each of the following sentences

1. Vietnamese people are very _________________ and hospitable.

A. reserved B. friendly C. official D. quiet

2. You have read this article on the website, _________?

A. don’t you B. aren’t you C. haven’t you D. have you

3. The girl said she _________ in Hue for the festival the next week.

A. can stay B. stay C. stays D. could stay

4. The final examination will be held _________ June 18th, 2013.

A. in B. on C. at D. from

5. The policeman asked us_________there.

A. not to go B. to not go C. not to going D. not go

6. If it _________, we will go to the movies.

A. didn’t rain B. doesn’t rain C. won’t rain D. isn’t rain

7. We’re good friends. We _________ each other since we were in primary school.
A. know B. have been known C. have known D. knew

8. We should _________ all the electric appliances when leaving our room.

A. turn off B. turning off C. turn on D. turning on

9. He’s not really interested in _________ on the farm.

A. to work B. work C. worked D. working

10. She went on working _________ it started to rain.

A. though B. because C. but D. and

11. When he _____ to the city, he saw an accident this morning

A. drove B. has driven C. drives D. was driving

12. Hoa: I suggest going camping next Sunday. Lan: _________.

A. That’s a fine day B. That’s a good idea C. That’s a reason D. That’s a good trip

13. We listened _________ while the examiner gave us the directions.

A. attention B. attentively C. attentive D. attentiveness

14. We are looking forward to the programme_________is on after the news.

A. its B. it C. which D. who

15. Most of us found using the Internet __________

A. useful B. used C. using D. usage

III. There is a mistake in the sentence. Find and correct it.

1. I haven’t heard from Maria since a long time. =>…………………………

A B C D

2. If it rain, I will stay at home and watch TV. =>…………………………

A B C D

3. They told me not go on that road late at night because it is very dangerous. =>………………..

A B C D

4. Are you interested between learning English? =>…………………………

A B C D

5. My brother enjoys to go to the park on Summer evenings. =>…………………………
A B C D

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