Exercise 5: Give the correct form of the word in brackets.
1. He went to his house, lied down on the bed, and (sleep) ……………… right away.
2. I (buy) ……………… the ticket yesterday. I am (go) ……………… Dalat tomorrow.
3. Tim (attend) ……………… the meeting at school at the moment.
4. He (have not) ……………… English for 2 years.
5. Our class (start) ……………… at 9am.
6. I always (brush) ……………… my teeth before I go to bed.
7. I (study) ……………… English since I was 21.
8. He was listening to music when his boss (come) ……………… yesterday.
9. I (have do) ……………… all the homework all afternoon.
10. I (be) ……………… a student.
11. She (wait) ……………… you for all day.
12. He wasn’t working when his boss (call) ……………… him yesterday.
13. She (be) ……………… at her boyfriend’s house yesterday morning.
14. I (talk) ……………… to my father at the moment.
15. We (be) ……………… in Nhatrang on their summer holiday last year.
Exercise 6: Tìm lỗi sai và sửa lại các câu sau
1.  They took my pencils, ripped my books and then laugh at me.
2. Susie goes out 4 hours ago and hasn’t come back, I’m worried.
3. Honey, have you seen my white shirt anywhere? Our daughter need it for a school project.
4. How did I met your mother? Well, we were both running late for work that day and then we was bumped into each other.
5. Stop! You being hurting yourself!
6. By the time I came, she is no where to be seen.
7. This song is so good that I have been listening to it since 4 hours

tìm x 
a, 2√x+2=  √x3−8
 b,(√x-2 )( 5- √x ) = 4- x

Viết lại câu:
507. What are you thinking at the moment?
→What are in
508. Mary rang hours and hours ago. (THAT)
→
509. It was easy for us to find the house.
→We had no
510. Attendance at the exhibition has been down this year.
→The exhibition
511. It shouldn't have surprised me that my children didn't like the new, cheaper ice-scream.
→I might
512. Don't go to lunch until you have typed all these letters.
→Make sure
513. He didn't realise until that moment how much he loved her.
→Only then
514. You can leave only when I tell you.
→Until I tell you,
515. I think you should go by train. (WERE)
→
516. It wasn't my fault the business failed.
→Through no
517. David played the main role when the proposal was drafted. (INSTRUMENTAL)
→
518. If you hadn't changed our original agreement, everything would have been fine. (STUCK TO)
→
519. When I heard her speak, it affected me profoundly. (IMPACT)
→
520. The rain in Ha Noi last October was the biggest one since 1984.
→No rain