A. Dân ca quan họ Bắc Ninh.

Đèn compact kích thước nhỏ nhưng có hiệu suất lớn hơn nhiều và tuổi thọ cao hơn 6-7 lần, giúp tiết kiệm điện đến 80% nên được khuyến khích dùng thay đèn sợi đốt. Ngoài ra, bóng đèn compact còn giảm thiểu sự nhấp nháy ánh sáng do được trang bị chấn lưu điện tử.

a.3x.(x-2)-5x+10=0

  <=> 3x(x-2)-5(x-2)=0

<=> (x-2)(3x-5)=0

=> x-2 = 0 hoặc 3x-5 =0

=> x=2 hoặc x=$\frac{5}{3}$
b.

$$\begin{gathered} 4x^2+6x=6x+9 \\ \iff 4x^2=9 \\ \iff x^2=\frac{9}{4} \\ \iff x=\frac{3}{2} hoặc x=\frac{-3}{2} \end{gathered}$$
c.15x(3x-2)=3(3x-2)

<=> (3x-2)(15x-3)=0

$\iff 3x-2 =0 \Rightarrow x=\frac{2}{3}$

hoặc $15x-3=0\Rightarrow x=\frac{1}{5}$

1. B (các từ còn lại liên quan đến người) 

2. D (tính từ, các từ còn lại là động từ)

1, Pack your lunch with lunch box instead of plastic bag.

2. Turn off the light when it isn't used.

3. How do you go to school everyday? 

4. How much does this plasma TV cost? 

5. She has to bring two sides together.

C => Lam

1. The girls who are playing skip rope are my friends.
2. He finally married the girl whom he loved.
3. The presents which my mother gave me are very beautiful.
4. Tet is a festival that occurs in late January or early February.
5. The men whom you saw on TV were from China.
6. Is this the pen that you lost?
7. The car which he has just bought is very expensive.
8. The book which he is reading is on Christmas Eve.
9. Do you know the boy whom the police are looking for?
10. The man whom we met yesterday is a famous doctor.
11. The actor whom Lan likes best is Lam Truong.
12. The dog which is barking is Lan’s
13. The woman whom you met yesterday is my teacher.
14. The news that makes me happy is from Tam.
15. These exercises which the teacher asks you to do is difficult

They are clearing all the pollution off the beach.
Thi Vai River is very polluted now.

1 What was the matter with you?
2 She bought a lot of vegetables at the stall yesterday.
3 He ate breakfast at a restaurant yesterday.
4 What was wrong with him?

1, Nam said he tried to learn hard to pass the entrance exam.

2, Mary told Jane didn't want to come to bobby's party.

3, Jane's mother informed her daughter was writing a letter to her French friends at that time.

4, The principal hoped Kate would be a good teacher in the future. 

5, My friend told me we might go sightseeing in Sapa the week after.

How..... is Minh?----> he is one mêtr fifty centimeters
A.tall B.heavy C.old D.often
I like apples and...... does Minh
A.so B.too C.Neither D.either

9, He really likes going swimming at the swimming pool.

10. Mary quite likes getting up early in the morning.

11. I don’t mind chatting on the internet.

12. I don’t mind helping mum in the kitchen.

13. How many eggs are there on the table?

14. How many vitamins are there in white rice?

15. How much cheese is there in the pizza?

16. How much fat there is in chocolate?

C => couldn't

a, The boy who sat next to me yesterday is going to travel with me.

b, My brother John who sat next to me yesterday is going to travel.

c, She was thinking about the two jobs which had been offered to her.

d, He was smoking a cigarette which was forbidden there.

e, She didn't see the man who had stolen her bicycle.

Hoa's hard study results in good marks.

2, called/ weren't

3, became/took/ was/ have changed/ 

4, has never been/tried/ has ever succeeded 

1, The cartoons which my children often enjoy are interesting and shown on the Disney channel.

2, The house where we were invited to, bought last month. 

3, I don't know the man who sits next to Kate on the plane. 

1, fungus-eating

2, page-turning

3, record-breaking

4, money-raising

5, thought-provoking

using (what about + Ving)

1, of 

2, on

3, heavy

4, tall