1. A
2. C
3. C
4. A
5. A
6. C
7. A

1. Is she watching football on TV at the moment ? - No, she isn't.
2. What does she read in the evening ? - She reads books.
3. Are they walking to school at the moment ? - NO, they aren't. They are staying at home.
4. Did Jane watch TV yesterday ? - No, she didn't
5. Who often does housework in your family ? - My mother does.
6. Where did you go last Sunday ? - I went picnic.
7. Does your mother go to the supermarket when you are phoning ? Yes, she does.
8. He is walking to school while his mother is going to work.
9. They are playing computer game at the moment.
10. Did she read book last night ? - No, she didn't. She did her homework.
11. Jane usually goes to the beach and enjoys fresh air.
12. Are you waiting for your mother now ? - Yes, I am. 
13. She was making a cake this time last night.
14. She phoned me when I was doing my homework.

1. Traditionally
2. speakers
3. daily
4. freedom
5. widely
6. fashionable
7. advertisement
8. native
.
1. moved
2. haven't heard
3. is trying
4. have collected
5. swim
6. had
7. went

ĐK: `x \ne kπ`

`cot(x-π/4)+cot(π/2-x)=0`

`<=>cot(x-π/4)=-cot(π/2-x)`

`<=>cot(x-π/4)=cot(x-π/2)`

`<=> x-π/4=x-π/2+kπ`

`<=>0x=-π/4+kπ` (VN)

Vậy PTVN.

14. D

15. B

1. D
2. B
3.C
4. A

Nghĩa như nhau.

said to sb = told sb

Nick said he had seen Helen at a party the night before and she had seemed unwell.