1 The movie we went to was very interesting.

2 The man I told you about is over there.

3 The woman I work for pays me a fair salary.

4 Alice, who is living with them, likes the family.

5 The picture Tom is looking at is beautiful.

6 I enjoyed the music we listened to after dinner.

7 The person I spoke to was very friendly.

8 The hotel we stayed at was very clean.

9 The person Sally was waiting for never came.

10 I never found the book I was looking for.

11 One of my subjects is Literature, which I have been interested in for a long time.

12 The interviewer wanted to know the name of the college from which I had graduated.

13 Organic chemistry is a subject that I am not familiar with.

14 The chair I am sitting in is very hard.

$HaNa$

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.She is the woman whom I told you about.

2.The song to which we listened last night was interesting.

3.The picture which she was looking at was beautiful.

4.I'll give you the address which you should write to.

5.The movie which they are talking about is fantastic.

6.Renewable energy sources are difficult topics which I'm not familiar with.

7.Do you like the town where you live?

9.The house where I used to live in has just been pulled down .

10.They finally found the most beautiful church which in front of the church stood a statue .

11.The taxi driver who took me to the airport was friendly.

12.I liked thw woman whom I met at the party last night.

13.I must thank the poeple whom I got a present from.

14.The city where we spent our holiday in is beautiful.

15.The man whom I told about yesterday is standing over there.

16.The man whose wallet was stolen called the police.

17.I have to call the man whose umbrella I accidentallt picked up after the meeting.

18.The mistakes which you have to correct are very important.

19.My grandfather who is a wise man has greatly influenced my life .

20.Dianna Jones who used to teach Spanish has organized a your for senior citizens .

21.What's the picture which you are looking at?

22.Sunday is the day when we can visit our parents.

Exercise 5 : Combine the following sentences , using Relative clause following a preposition :

1. She is the woman . I told you about her ..

->She is the woman about whom I told you

2. The song was interesting . We listened to it last night .

->The song to which we listened last night was interesting

3. The picture was beautiful . She was looking at it .

-> The picture at which she was looking was beautiful

4. I'll give you the address . You should write to it .

-> I'll give you the address to which you should write

5. The movie is fantastic . They are talking about it .

-> The movie about which they are talking is fantastic

6. Renewable energy sources are difficult topics . I'm not familiar with these topics .

-> Renewable energy sources with which I 'm not familiar are difficult topics

7. You live in a town . Do you like it ?

-> Do you like the town in which you live?

9. The house has just been pulled down . I used to live in this house .

-> The house in which I used to live has just been pulled down

10. They finally found the most beautiful church . In front of the church stood a statue .

-> They finally found the most beautiful church in front of which stood a statue

11. The taxi driver was friendly . He took me to the airport .

-> The taxi driver who took me to the airport was friendly

12. I liked the woman . I met her at the party last night .

-> I like the woman whom I met at the party last night

13. I must thank the people . I got a present from them ...

-> I must thank the people from whom I got a present

14. The city is beautiful . We spent our holiday in that city .

-> They city in which we spent our holiday is beautiful

15. The man is standing over there . I told you about him yesterday .

-> The man about whom I told you yesterday is standing over there

16. The man called the police . His wallet was stolen .

-> The man whom his wallet was stolen called the police

17. I have to call the man . I accidentally picked up his umbrella after the meeting .

-> I have to call the man whom I accidentally picked up his umbrella after the meeting

18. The mistakes are very important . You have to correct them .

-> The mistakes which you have to correct are very important

19. My grandfather has greatly influenced my life . He is a wise man .

-> My grandfather who is a wise man has greatly influenced my life

20. Dianna Jones has organized a your for senior citizens . He used to teach Spanish .

-> Dianna Jones who used to teach Spanish has organized a ..... for senior citizens

21. You are looking at the picture . What's the picture ?

-> What's the picture at which you are looking?

22. Sunday is the day . We can visit our parents on that day .

-> Sunday is the day on which we can visit our parents

Eg 1. This car is very cheap. I can buy it.

→ This car is cheap enough for me to buy.

2. Jack is very clever. He can do this work.

>>Jack is clever enough to do this work.

3. Mary was very kind. She could help you with the work.

->...Mary was kind enough to help you with the work.

4. The movie was so exciting. It attracted all the audience.

->The movie is exciting enough to attract all the audience.

 5. He was very sick. He had to see a doctor.

->........ He was sick enough to have to see a doctor.

6. The children are early. They can have good seat.

->.....The children are early enough to have good seat.

7. That house isn't large. We can't stay there for the night

->.....That house isn't large enough for us to stay there for the night

8. These oranges are ripe. You can eat them.

->....These oranges are ripe enough for you to eat...

9. She is very old. She can drive a car,

-> ..She is old enough to drive a car

 This car is very cheap. I can buy it.

→ This car is cheap enough for me to buy.

2. Jack is very clever. He can do this work.

>>Jack is clever enough to do this work.

3. Mary was very kind. She could help you with the work.

->...Mary was kind enough to help you with the work.

4. The movie was so exciting. It attracted all the audience.

->The movie is exciting enough to attract all the audience.

 5. He was very sick. He had to see a doctor.

->........ He was sick enough to have to see a doctor.

6. The children are early. They can have good seats.

->.....The children are early enough to have good seats.

7. That house isn't large. We can't stay there for the night

->.....That house isn't large enough for us to stay there for the night

8. These oranges are ripe. You can eat them.

->....These oranges are ripe enough for you to eat...

9. She is very old. She can drive a car,

-> ..She is old enough to drive a car

As you know, sources of energy like solar energy, wind energy,.. are very important. People use them for many things:cooking, heating,ect...But, almost the sources of energy have the disadvantages and advantages. There are two kinds of energy:non-renewable and renewable energy. Non-renewable is very popular in many countries. They are abundant, available and easy to use. However, they won't last forever and they're harmful for the environment. And, people will use renewable energy to solve the problems of non-renewable energy. Renewable sources of energy are forever and they're clean and safe, too. Nevertheless, they have some problems, too. For example, nuclear is clean but it's dangerous to use. Wind power has many advantages but it isn't available,... On the other hand, there are some sources of energy don't have some serious problems like solar energy. It's the reason why people use solar energy in the future. So, what should we do to save energy? We should use them properly and use them less. We should use less cars or motorbike, too. It also have the enviroment. Energy is very important, we should protect them for our life in the future.

Đáp án: T

1.sources/you/some/can/name/non-renewable/?

- Can you name some non-renewable sources?

2. source/solar/a/renewable/is/energy/energy/of/.

- Solar energy is a renewable source of energy.

3. leave/off/you/home/the/light/turn/should/before/you.

- You should turn off the light before you leave home.

4. should/to/electricity/how/we/do/save/?

- How should we do to save electricity?

5. protect/in/energy/environment/we/use/wind/future/may/to/the.

- We may use wind energy in the future to protect environment.

6. source/of/environment/are/good/energy/renewable/for/.

- Renewable source of energy are good for environment.

7. solar/solar/power/panels/we/through/get.

- We get solar energy through solar panels.

Đáp án: on the increase