1. I (never see) ……………………………..any one more punctual than your brother.
2. I (meet) .............................................. your brother at 4pm tomorrow at Green Street.
3. I understand you (have)..............................................an unpleasant experience at the weekend.
What (happen)..............................................exactly?
4. He (light)...........................................a cigarette and (walk)...........................................to the
window.
5. My clothes are not in the room. Someone (take) ..............................................them away.
6. Mozart (write) ...............................................the music for “The Marriage of Figaro”
7. David (repair) ..............................................the TV set at the moment. He (work)
..............................................at it for one hour or so.
8. I (work) ..............................................on my report since Monday. Now I (write)
..............................................the conclusion.
9. Tell them to stop and take a rest. We (work) ..............................................long enough.
10. Ms. Abbott (walk) ..............................................home from work when she (see)
.............................................. the child fall off the bridge.
11. I can’t go with you as I (not finish) ..............................................my work.
12. “……………..you (be)………………here before?” – “Yes, I (spend)
..............................................my holiday here last year.
13. He (leave)..............................................for London 2 years ago and I (not see)
..............................................him since.
14. I suppose when I (come)..............................................back in two years’ time, they
(pull)..............................................down all these old buildings.
15. By the time you (finish)..............................................cooking, they
(do)..............................................their homework.
16. My father (fight) ..............................................for four years in the last war.
17. I’m taking my daughter out tonight. She (not have) ..............................................fun for a long
time.
18. When I (arrive)..............................................home, I (find)..............................................that she
just (leave)..............................................a few minutes before.
19. I don’t know what’s the matter with him. He (act)..............................................funny since you
(be) ..............................................away.
20. I’m sure you (forget)..............................................me by the time I (be)
..............................................back in five years.
21. Stay here till the lights (turn) ..............................................green.
22. No one (know) ..............................................when he (come)
..............................................tomorrow, or whether he (come) ..............................................at all.

23. As Hugh and I (come) ..............................................down the steps we nearly (run)
..............................................into my father.
24. I will get back as soon as I (get) ..............................................through with my business.
25. He (not go)..............................................forty yards in the direction of Piccadilly when he (meet)
..............................................Mary.
26. Who ……………….you (go)…………….to the cinema with last night?
27. When we (arrive)........................................in Hanoi tonight, it probably (rain)…………………….
28. It was a fine day and the roads were crowded because a lot of people (rush)
..............................................to the seaside.
29. You (not see) ..............................................my sister for a long time. You
(visit)..............................................us tonight?
30. I (think) ..............................................about you a lot lately, and I (come)
..............................................to the conclusion that I (not be)..............................................able to
live without you.
31. The car (be) ..............................................ready for him by the time he
(come)..............................................tomorrow.
32. I’m going to retire soon. By the first of July I (work)..............................................here for 25
years.
33. “Your guests already (come)..............................................” – “I know.”
34. Last night we (watch) ..........................................television when the power
(fail)………………….
35. There (be) ..............................................great changes in our village in the past few years.
36. Think carefully. I’m sure you (remember) ..............................................his name.
37. Mr. Wilson (make) ..............................................some interesting statements yesterday.
38. They (build)..............................................that bridge when I (be) …………………..there last year.
39. At this time next week they (sit)..............................................for their entrance exam.
40. By 1999 this area (be) ..............................................turned into an industrial centre.
41. Don’t leave until you (talk) ..............................................to the headmaster about the problem.
42. The radio (play) ..............................................since 7a.m. I wish someone turned it off.
43. It is nearly autumn, soon leaves (change)..............................................colours.
44. The children were frightened because the lights suddenly (go) ..............................................out
and they (sit)..............................................in the dark.
45. There was something familiar about her face, but I couldn’t remember where I
(see)..............................................her before.
46. I (sit)..............................................down for a rest while they (repair)…………………my shoes.
47. I (be)...........................................in this town for 15 years. My family
(move)……………………here
when I (be)..............................................ten years old.
48. A moment, please. I (not be)..............................................ready yet, but I (be)……………………
in a couple of minutes.

49. For the last three years I (spend) ..............................................every minute of my life on the
problem.
50. By the end of this month, I hope, I (write)..............................................200 pages of my new
novel.

Tính y', giải phương trình y'=0 (nếu có) và xét dấu của y' trên trục số:
y= $-x^3$+6x+1

phân tích đa thức thành nhân tử:
a) 12$x^2$y+3x$y^2$-4xy
b) $x^2$-4x-$y^2$+4
c) $x^3$+2y-x-8$y^2$

$\left[\sqrt{\left(2+\sqrt{3}\right)}-\sqrt{2-\sqrt{3}}\right]÷\sqrt{2}$

6-$6\sqrt{3}+3\sqrt{3}$+3
1-$\sqrt{3}+\sqrt{3}$+1

I wasn't careful when i was driving .I had an accident

Viết lại bằng should have

Cm ${\sin }^6$x + ${\cos }^6$x = 1 -3 ${\sin }^2$x ${\cos }^2$x