Tóm tắt: V_gỗ = 10 m³

              D_gỗ = 800 kg/m³

              1 xe tải 7 tấn = m_gỗ ?

Khối lượng của khối gỗ là: m_gỗ = D_gỗ . V_gỗ = 800 . 10 = 8000(kg) = 8 tấn

Do m_gỗ > m_xe => 1 chiếc xe tải 7 tấn ko thể chở hết khối gỗ trên

Build: thin, slim, chubby, cool

Height: tall, short

Age: teenager, old

Hair: straight, brown, curly, fair, long

Character: easygoing, smart, clumsy, athletic, careful, elegant, friendly, funny, sweet, silly, polite

so thu nhat la :198:3=66

so thu 2 la :66-1=65

so thu 3 la :65+2=67

d/s:st1:66

st2:65

st3:67

I/Dựa vào gợi ý hãy viết lại câu hoàn chỉnh:

1. We ought / use / cloth bags / instead / reuse / plastic bags.

=> We ought to use cloth bags instead of reusing plastic bags.

2. I / used / look after / younger / brother / sister / when / parents / at / work.

=> I used to look after my younger brother and sister when my parents was at work.

3. Why / we / have / put / dangerous things / out / children's reach?

=> Why do we have to put dangerous things out of children's reach?

II/Sắp sếp các từ thành câu hoàn chỉnh:

1. Mrs. Lan / up / order / to / early / this / the / morning / has / in / get / to / meeting / on / get / time / to.

=> Mrs. Lan has to get up early in order to get the meeting on time this morning.

2. Children / Africa / don't / enough / and / to / in / food / eat / warm / have / to / clothes / wear.

=> Children in Africa don't have enough food to eat and warm clothes to wear.

3. My / like / but / meals / sister likes cooking / washing / doesn't / doing / she / the / up.

=> My sister likes cooking meals but she doesn't like doing the washing up.

COMBINE THESE SENTENCES BY USING RELATIVE PRONOUN:

1. Chinese people have a very special kind of soup. This kind of soup is made from shark's fin.

=> Chinese people have a very special kind of soup which is made from shark's fin.

2. A lot of fish died everyday. They live in the polluted sea.

=> A lot of fish which live in the polluted sea, died everyday.

3. We have a new teacher. I really like her.

=> We have a new teacher who I really like.

4. Many people get sick or die every year. These people eat puffer fish, a very poisonous species.

=> Many people who eat puffer fish, a very poisonous species, get sick or die every year.

5. She'll tell you the story. That story will surprise you.

=> She'll tell you the story which will surprise you.

6.The most beautiful park is opposite my house. It has a lot of big trees.

=> The most beautiful park where has a lot of big trees, is opposite my house.

7.Peter is studying French and German. He has been abroad.

=> Peter who has been abroad, is studying French and German.

8. You've all met Michael Wood. He is visiting us for a couple of days.

=> You're all met Michael Wood who is visiting us for a couple of days.

9. We are moving to Manchester is the north west.

=> We are moving to Manchester where is the north west.

10. I'll stay with Adrian. His brother is one of my closet friends.

=> I’ll stay with Adrian whose brother is one of my closet friends.

11. The Earth is a planet. It can support life.

=> The Earth which can support life, is a planet.

12. The book is about the girl. She runs away from home.

=> The book is about the girl who runs away from home.

13. The picture was very beautiful. She was looking at it.

=> The picture which she was looking at, was very beautiful.

14. The woman teaches me English. You are listening to her.

=> The woman who you are listening to, teaches me English.

15. Do you know the woman? Who is coming toward us?

=> Do you know the woman who is coming toward us?

16. The fence is made from wood. It surrounds our house.

=> The fence which surounds our house, is made from wood.

17. The first person is Mr.Smith. We must see him.

=> The first person who we must see, is Mr.Smith.

18. Tet is a big occasion. The member of family gather on this occasion.

=> Tet which the member of family gather on, is a big occasion.

19. New York is a famous city. Everybody want to live in this city.

=> New York where everybody want to live in, is a famous city.

20. Trinh Cong Son composed songs. They are greatly liked by millions of Vietnamese people.

=> Trinh Cong Son composed songs which are greatly liked by millions of Vietnamese people.

C. them

(x⁴ - 3x² + 9)(x² + 3) - (3 + x²)³ = x⁶ - 3x⁴ + 9x² + 3x⁴ - 9x² + 27 - 27 - x⁶ - 27x² - 9x⁴

= - 9x⁴ - 27x² = -9x² (x² + 3)

I . Choose the best answer for each of the following sentences by circling A, B, C or D.

1. C. before 

2. B. neighborhood

3. B. unfortunately

4. C. decided to

5. C. on 

6. A. hobbies   

7. D. No. Thank you. I’m fine

8. C. different                      

9. B. should     

10. D. collecting

11. C. went           

 12. B. spend       

 13. A. to give   

 14. A. playing         

 15. A. study     

 16. B. live    

 17. B. at                         

 18. A. in       

 19. D. in

 20. D. exhibition

II. Fill in the blanks with a suitable word.

4. After the death of his parents, he was sent to an orphanage.

III.  Read the passage carefully and  then answer the questions below.

            Tom’s going to spend a year in China soon, he’ll study Chinese language and History at the university, he’ll live in the university, he’ll share the room with a Chinese student. Days start very early so he’ll have to get up at six, he’ll have breakfast at six thirty. His classes will be in both English and Chinese, they’ll begin at seven thirty. Lunch is at twelve and then there’s a rest until three. He’ll continue learning until six. He thinks it’ll be difficult for him but he likes the course.

1. What will he study ?

-- > He’ll study Chinese language and History.

2. Who will he share the room with?

-- > He’ll share the room with a Chinese student.

3. Will it be easy or difficult for him to attend the course ?

-- > It will be difficult for him to attend the course.

4. What time will his English and Chinese classes start?

-- > They will start at seven thirty.

\(\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{b+a}>\frac{a}{a+b+c}+\frac{b}{b+c+a}+\frac{c}{c+b+a}=\frac{a+b+c}{a+b+c}=1\left(1\right)\)

Đổi : 112 % = 28 / 25

Tổng số phần bằng nhau là :

28 + 25 = 53 ( phần )

Số học sinh nam trường đó có là :

636 : 53 x 25 = 300 ( học sinh )

Đáp số : 300 học sinh