Put in 'mustn't'or 'don't/doesn't have to:
1.We have a lot of work tomorrow. You....mustn't..... be late.
2.You.....mustn't..... tell anyone what I just told you. It's a secret.
3.The museum is free. You....don't have to....pay to get in.
4.Children.....mustn't.....tell lies. It's very naugthy.
5.John's a millionaire. He....doesn't have to....go to work.
6.I.....don't have to....do my Washington, because my mother does it for me.
7.We....don't have to.....rush. We've got plenty of time.
8.You.....mustn't.....smoke inside the school.
9.You can borrow my new dress but you....mustn't....get it dirty.
10.We......mustn't.......miss the train. It's the last one tonight.
11.She.....doesn't have to.....do this work today,because she can do it tomorrow.
12.I......don't have to.....clear the floor today, because I cleaned it yesterday.
13.We.....mustn't....forget to lock all the doors before we leave.
14.We....don't have to.....stay in a hotel in London, we can stay with my brother.
15.I.....mustn't....spend too much money today. I've only got a little left.
16.They.....don't have to....get up early today, because it's Sunday.
17.I.....mustn't....eat too much cake, or I'll get fat!
18.We...mustn't....be late for the exam.
19.You.....don't have to.....tidy up now. I'll do it later.
20.He....doesn't have to.....cook tonight because he's going to a restaurant.

Chúc bạn học tốt!

1. Trung fell off his bike, but luckily he didn't hurt herself. 

=> himself

2. You haven't to finish the work this afternoon, you can leave it later.

=> sooner

3. Mrs Van's daughter is absent today because her sickness.

=> of her sickness

4. Let's putting the coffee table in the middle of the room. 

=> put

5. On the table of his room there have many books. 

=> are

1. Trung fell off his bike, but luckily he didn't hurt herself. 

Trung fell off his bike but luckily he didn`t hurt herself => himself

2. You haven't to finish the work this afternoon, you can leave it later.

You haven`t to finish work this afternoon. You can leave it later

3. Mrs Van's daughter is absent today because her sickness.

Mrs.Van daughter is absent from class today because of her sicknees

4. Let's putting the coffee table in the middle of the room. 

Let's put the coffee table in the middle of the room

5. On the table of his room there have many books. 

On the table in his room there have many books

Give the correct form of the verbs in brackets:

1.John (study)..will study.. until you're finished- then we can go.

2.What do you want to do after the class (finish) ..finishes..?

3.Jenny will come here after she (finish)..finishes.. work.

4.She's going to look for a job as soon as she (arrive).arrives... in London.

5.I (give).will give.. up smoking!

6.She (send).wil send.. me an email before she leaves the office today.

lớp 9 đó bạn

recycling/ nothing/ list/ vegetables/ something/ save/ trouble/ polluting/ taking. Our environment is in (1)trouble. Modern ways of living and today’s industries are (2)polluting it. Most people think there is (3) nothing they can do. This is not true. Everyone can do something to help (4) save our environment. Here is a (5)list of things you can do.

Our environment is in trouble. Modern ways of living and today’s industries are polluting it. Most people think there is nothing they can do. This is not true. Everyone can do something to help save our environment. Here is a list of things you can do.
- Help to cut pollution by taking the bus to work instead of your car.
- Buy fruit and vegetables that have not been treated with pesticides.
- Recycle all your cans, bottles and paper. There should be a recycling center somewhere near your home, so take them there.

Most of the world’s energy comes from the sun. The sun’s energy is in wood, oil, and other things that people use for energy.

VI. Read the text then answer true or false

People use many sources of energy. Ancient people used only their arms, hands, and simple tools until they discovered fire. Later, people learned to use the energy of the wind to sail ships. Then they learned to use animals to do work. In the eighteenth and nineteenth centuries, people began to use machines. The first machines used steam. They burned coal to heat water. The hot water turned into steam, and the steam engine did the work. Later, people began to use the gasoline engine, and today people are using nuclear energy. Energy is one of the basic concepts, or ideas, of physics. It is the ability to do work. Without energy we could live. We need energy to work, and scientists are always looking for new sources of energy.

1. None of the world’s energy comes from the sun. F

2. Wind, steam, and gasoline are sources of energy. T

3. People have never used nuclear energy. F

4. Energy is the ability to do work. T

5. We need new sources of energy. T

1 It take her half an hour to get to work

She gets to work in half an hour.

2: You dont't need to finidh the work today

It is not necessary for you to finish the work today.

3: Because of the bad weather. They had to stop their picnic

The bad weather prevented them from having their picnic.

4 My father got to sam Son by taxi last month

My father took a taxi to Sam Son last month.

5:The trip to Da Lat city was cheaper than we expected

The trip to da Lat city wasn't as expensive as we expected.

6 The children liked to walk in the rain.

The children enjoyed walking in the rain.

7 Our summer vacation lasts three months

We have a three - month summer vacation.

8 The sailors like the sea better than the land

The sailors prefer the land to the sea.

1.Do you have a cheaper bicycle than his?
-Is this...........your bike is cheaper than his bike?

2.I spend half an hour getting to school.

-It.....takes me half an hour to get to school

3.It isn't important for you you to finish the work today.

-You don't  have to finish the work today

1.Do you have a cheaper bicycle than his?
-Is this the cheapest bicycle do you have?

2.I spend half an hour getting to school.

-It takes me half an hour to get to school

3.It isn't important for you you to finish the work today.

-You don't have to finish the work today

1. D. hadn't hadto.

2 D. needn't
3. will be finishedhed.

4 D. look afterr.

5. C.. to operate