1. am going
2. rains
3. will watch
4. doesn't wear
5. has
6. aren't
7. won't go
8. Are...taking
9. Will she visit
10. are

`=(x^2-2x+1)-4`

`=(x-1)^2-2^2`

`=(x-1+2)(x-1-2)`

`=(x+1)(x-3)`

1. Trang asked what she should wear to the fancy dress party.

2. She wondered she should have Chau with the money her mum had given to her.

3. He asked me how long I had been standing there.

4. My teacher asked what skills were I concerned most.

ĐKXĐ: `x>4`.

`(\sqrt(x+1))/(\sqrt(x-4)) = 3`

`<=> (x+1)/(x-4)=9`

`<=>x+1=9(x-4)`

`<=>x+1=9x-36`

`<=>-8x=-37`

`<=>x=37/8` (TM)

Vậy `S={37/8}`.

B.

2. didn't stay

3. organized

19. won't play

20. won't return

21. won't meet

23. Will Lan visit

24. Will...play

25. Will you have

6. We decided to stay at home and watch TV as  it was raining heavily.
7. He's training hard because he wants to get fit.
8. Sally didin't go to school yesterday since she was ill.
9. Jane stayed behind after the class because she talked to the teacher.
10. He stayed at home because/as/since he was sick.

1. This is the first time I had such an embarassing experience.
2. Ronaldo plays football the best.
3. The more books you read, the more knowledge you will have.
4. I think that novels is not so interesting as that history books.