a * b = 7
a * c = 5
b * c = 35
=> ( abc )² = 7 * 5 * 35 = 35².
=> abc = 35

Persuading her to come is pointless.

=> It't is no use persuading her to come.

He tried to escape but the police stopped him.

=> The police prevented him from escaping.

It't pointless to worry about someone else's problems.

=> There's no point in worry about someone else's problems.

VI. Each sentence has a mistake. Find the mistakes and correct them.

1. How height is the Petronas Twin Towers ?

=> high

2. My brother is busyer than I am.

=> busier

3. Zhang is from China. She speaks China.

=> Chinese

4. How many homework does Lan have everyday ?

=> How much

5. Mr.Minh rides his bike to work at the moment.

=> is riding

1. Look! That planne is flying (fly) towards the airport. It is going to land ( land ).

2. How often does Lien practice ( practice) the piano in the club ?

- She goes ( go ) there twice a week.

3. I don't like ( not like ) volleyball, so I don't learn ( not learn ) to play it.

4. At present, we are rehearsing ( rehearse ) a play. Nam is playing ( play ) the flute.

5. We are going to see (see) a movie tomorrow. Will you join (join) us ?

VII. Rewrite the following sentences so that the meaning stays the same:

1. Hang is the fattest girl in my class.

=> No girl in my class is fatter than Hang.

2. How much do these flowers cost ?

=> What is the price of these flowers ?

3. Why don't we go for a walk ?

=> Let us go for a walk.

4. She always cycles to work every morning.

=> She always goes to work by bicycle every morning.

5. How many classrooms are there in your school ?

=> How many classrooms does your school have ?

6. How tall is Nam ?

=> What is Nam's height ?

7. The hotel is to the left of the bank.

=> The bank is to the right of the hotel.

8. How wide is the Great Wall of China ?

=> What is the width of the Great Wall of China ?

9. Lan's hair is long and black

=> Lan has long black hair.

10. She likes drinking milk.

=> Milk is her favorite drink.

a) 0(0;0),A(1;2),B(2;4),C(3;6),D(4;8)

b) vẽ khó lắm :)

\(0,025mm^2=2,5.10^{-8}m^2\)

Điện trở của bếp là:

\(R=\rho.\dfrac{l}{S}=1,1.10^{-6}.\dfrac{3,5}{2,5.10^{-8}}=154\left(\Omega\right)\)

Điện năng gia đình sử dụng trong 30 ngày là:

\(A=P.t=\dfrac{U^2}{R}.t=\dfrac{220^2}{154}.8.30\approx75429\left(W.h\right)=75,429kW.h\) Tiền điện mà gia đình phải trả là:

\(\)\(75,429.2000=150858\left(đ\right)\)

Studying English language in an English - speaking country has many advantages. Howver, I believe that it is not the best way to learn the language.

Firstly, most students who live in non - English - speaking countries learn English at secondary schooland at university.Although their spoken is not fluent, their knowledge of grammar is often quite advanced. This is useful when they come to an English - speaking country to improve the language.

Secondly, students'living at home do not have to worry about problems such as: finding accommodation, paying for their study, living costs and trying to survive in a foreign country. It would cause them much stress.

Finally, nowadays, the society is grower and grower and information technology is also improved. The internet thus also born. So we can register a few courses on the network. It also helps us to speak and communicate with English speakers.

For the reasons above, I believe that we can learn English whenever and wherever nowadays.

Đặt câu hỏi cho phần in nghiêng:

1) We live in the country.

=> Where do you live ?

2) The museum is near the hopital.

=> Where is the museum ?

3) Yes,there is a hopital in my neighborhood.

=> Is there a hospital in your neighborhood ?

4) Yes,there is a drugstore next to my house.

=> Is there a drugstore next to your house ?

5) Lan's mother works in a hopital.

=> Where does Lan's mother work ?

6) Ba's father works in a factory.

=> Where does Ba's father work ?

7) They live in the city.

=> Where do they live ?

8) Minh's house is next to a bookstore.

=> Where is Minh's house ?

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