1. Look! The plane is flying towards the airport. It ( land) is landing.

2.The Nile River ( flow ) flows to the Mediterranean Sea

3. You mustn't ( eat ) eat food in this canteen

4.How does your sister ( go ) go to school everyday?

II.Hoàn thành câu

1. stay / grandparents / am / with / this / I / to / my / going / weekend .

=> I am going to stay with my grandparents this weekend.

III. 1. Elizabeth and Chalds are from England. They speak English

2. They are listening to the tape

3. The plan flies to mountains, river and towns

4. What would you like for dinner?- I'like some noodles

5. My mother wants a sanwich and a glass of orange juice

I : Sắp xếp

1.to begin / Are you / ready / today? / your lesson/

=> Are you ready to begin your lesson today?

2.do / everyday? / How much / we drink / water

=> How much water do we drink everyday?

3.let / children / near the park. /Don't / play

=> Don't let children play near the park.

4.classes / do your son's / What time / the afternoon? / start in/

=> What time do your son's classes start in the afternoon?

II: Điền từ

1.The news on T.V last night .......... very good.(was/were/had/be)

2.You had BETTER not eat too many candies because they are not good for your teeth.(5 vạch nhé)

Be able

1, We hurried to school so as not to be late

=> We hurried to school in order not to to be late.
2, He climbed the tree in order to get a better view

=> He climbed the tree so as to get a better view.
3, You should get up early so that you will have time to review to lesson

=> You should get up early so as to have time to review to lesson.
4, Some young people like to earn their own living in order that they will be independent of their parents

=> Some young people like to earn their own living in order to be independent of their parents.
5, We should do morning exercises regularly so as to improve our health

=> We should do morning exercieses regularly in order to improve our healthy.
6, We should take advantage of the scientific achievements of the would so that we can develop our national economy

=> We should take advantage of the scientific achievements of the world so as to develop our national economy
7, every people in the world must unite their eforts to maintain and protest peace

=> Every people in the world must unite their eforts in order to/so as to maintain and protect peace.

Xét \(x\ge3\) thì ta có \(\left(x-3\right)+\left(x+2\right)=7\Leftrightarrow x=4\) (thỏa mãn)

Xét \(x< -2\) thì ta có \(\left(3-x\right)-\left(x+2\right)=7\Leftrightarrow x=-3\) (thỏa mãn)

Xét \(-2\le x< 3\) thì ta có \(\left(3-x\right)+\left(x+2\right)=7\Leftrightarrow5=7\) (vô lí)

Vậy \(x\in\left\{-3;4\right\}\)

\(\sqrt{2}D=\left(3\sqrt{2}+\sqrt{6}\right)\cdot\sqrt{12-6\sqrt{3}}=\left(3\sqrt{2}+\sqrt{6}\right)\sqrt{9-2.3\sqrt{3}+3}\)

          \(\left(3\sqrt{2}+\sqrt{6}\right)\left(3-\sqrt{3}\right)\)

Nhân ra rút gọn 

1. How much fruit DOES that farmer (produce) PRODUCE every year?

2. WILL he (buy) BUY a new house next month?

5.Now Kate (stand) IS STANDING at the corner . She (wait) IS WAITING for the bus

1. During the recession, the firm was making people redundant almost every week

=> During the recession, people were being made redundant by the firm almost every week.

2. Had a special messenger delivered the package before you got to the office?

=> Had the package been delivered by a special messenger before you got to the office.

3. The students usually hold the concerts at the university

=> The concerts are usually held at the university by the students.

4. The scientists are studying the problem carefully

=> The problem is being carefully studied by the scientists.

5. The police found two children in the forest

=> Two children were found in the forest by the police.

1. The manager always welcomes new employees

=> New employees are always welcomed by the manager.

2. Janet's colleagues gave her a present when she retired

=> Janet was given a present by Janet's colleagues when she retired.

3. Thomas Edison invented the phonograph in 1877.

=> The phonograph was invented by Thomas Edison in 1877.

4. Stephen Court has just invented an armchair which can play music

=> An armchair which can play music has just been invented by Stephen Court.

5. Where will your company send you next year?

=> Where will you be sent by your company next year?

1. He used to play football in our team.

=> What did he use to play?

2. The policeman is teaching traffic rules in the school yard

=> What is the policeman teaching in the school yard?

3. Most of the staffs in the company go to work by bus.

=> How do most of the staffs in the company go to work?

4. It's about 17 km from my house to Cua Lo Beach.

=> How far is it from your house to Cua Lo Beach?

5. The sign means you mustn't park here.

=> What does the sign mean?