We use many different energy sources to do work for us. Energy sources are classified into two groups -renewable and nonrenewable. Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution. On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.

5. Are renewable sources bad for the environment?

6. Why is renewable energy called green energy?

IV Choose the best option A, B, C or D.

1 Many ................ and artistic activities are held as the part of the flower festival in Da Lat.

A. cultural B. romance C. disappointed D. annoyed

2. Wind, hydro and solar are ................ resources.

A. modern B. renewable C. non-renewable D. new

3. At a seasonal festival, people race down the hill to ................ cheese.

A. break B. catch C. buy D. eat

4. They had to wear ................ to protect their eyes at the tomato festival.

A. goggles B. tradition C. trucks D. greasy

5. People are looking for cheap, clean and effective sources of ................

A. solar B. energy C. wind D. water

6. Nuclear energy can provide electricity for the world needs, but it is ................

A. cheap B. unlimited C. dangerous D. safe

7. I like public ................ because it is cheap and convenient.

A. journey B. travel C. vehicle D. transport

8. Do you want to ................ a taxi or a tram to Ha Noi capital?

A. fly B. walk C. drive D. take

9. At 6.00 am tomorrow, we ................ to Canada by plane.

A. will travel B. will be travelling C. will be travelled D. travel

10. Do you think we ................ driverless car in the future?

A. use B. to use C. will use D. have used

IV Choose the best option A, B, C or D.

1 Many ................ and artistic activities are held as the part of the flower festival in Da Lat.

A. cultural B. romance C. disappointed D. annoyed

2. Wind, hydro and solar are ................ resources.

A. modern B. renewable C. non-renewable D. new

3. At a seasonal festival, people race down the hill to ................ cheese.

A. break B. catch C. buy D. eat

4. They had to wear ................ to protect their eyes at the tomato festival.

A. goggles B. tradition C. trucks D. greasy

5. People are looking for cheap, clean and effective sources of ................

A. solar B. energy C. wind D. water

6. Nuclear energy can provide electricity for the world needs, but it is ................

A. cheap B. unlimited C. dangerous D. safe

7. I like public ................ because it is cheap and convenient.

A. journey B. travel C. vehicle D. transport

8. Do you want to ................ a taxi or a tram to Ha Noi capital?

A. fly B. walk C. drive D. take

9. At 6.00 am tomorrow, we ................ to Canada by plane.

A. will travel B. will be travelling C. will be travelled D. travel

10. Do you think we ................ driverless car in the future?

A. use B. to use C. will use D. have used

A. PHONETICS

I Find the word which has a different sound in the underlined part.

1. A. hour B. household C. rehearse D. horrible

2. A. hygiene B. energetic C. altogether D. surgery

3. A. oceanic B. decide C. socialize D. delicious

4. A. measure B. breakfast C. ten D. spread

5. A. stomachache B. biology C. worried D. comfortable

II Find the word which has a different stress pattern from the others.

1. A. dangerous B. plentiful C. another D. limited

2. A. attention B. holiday C. pollution D. effective

3. A. different B. expensive C. abundant D. convenient

4. A. petroleum B. advantage C. enormous D. tendency

5. A. nationality B. national C. nationalize D. nationalize

B. VOCABULARY AND GRAMMAR

III Fill in the blank with the suitable word given.

renewable      mine          turbine         alternative      testing

1. By the middle of the 21st century, people in developing countries will be using more ........................... energy.

2. ........................... sources of energy will be developed in the near future.

3. At this time next week, we will be installing a wind ........................... in our garden.

4. This is her smart phone, ........................... is over there.

5. At this time next week, we will be ........................... the new flying boat.

V Complete the following sentence with an appropriate form of the word given.

1. The most popular ........................... at recess is talking. (act)

2. Many young people are doing ........................... service. (common)

3. Living in the city is ........................... than living in the countryside. (noisy)

4. If you want to have a ........................... body, you should play sports. (health)

5. We have ........................... work to do in the afternoon than in the morning. (little)

VI Find and correct the mistake in each sentence.

1. Over population is causing more problem than we can imagine. .................

A B C D

2. There is no record of infant die rate in this city. .................

A B C D

3. It’s dangerous for tourists visit the slums. .................

A B C D

4. When people need money bad, they may commit crimes. .................

A B C D

5. Good healthcare helps people staying healthy and live longer. .................

A B C D

VII Complete the rewritten sentences by filling in the blank with the missing words.

1. Although she performed well, she didn’t receive good mark from the teacher.

Š ............................................. performance, she didn’t receive good mark from the teacher.

2. I’m frightened by horror films. However, I enjoyed watching them.

Š In spite of .......................................................... by horror films, I enjoyed watching them.

3. Is this novel hilarious?

Š This novel is hilarious, ........................................................................................................ ?

4. Did he live in Kon Tum at the age of 5?

Š He used to live in Kon Tum at the age of 5, ....................................................................... ?

5. Why don’t we go for a picnic tomorrow?

Š Let’s go for a picnic tomorrow, .......................................................................................... ?

6. I found this game incredibly exciting.

Š I was incredibly ......................................................................................... about this game.

7. This is my cat, not your cat.

Š This cat is ............................. not ........................................................................................

8. A group of foreigners visited the slums last week, didn’t they?

Š A group of foreigners ........................................................................................... , did they?

9. The countryside doesn’t suffer as much pollution as the city.

Š The city .................................................................................................... than the country.

10. Most of my friends find this town interesting

Š Most of my friends are ..................................................................................... in this town.

1. Although they were tired, they wanted to watch the film

-> In spite of..................................................................

2. We will reduce enery consumption as much as possible (change into passive voice)

-> Enery consumption......................................

3. They went to the Flower Festival in Dalat two years ago ( đặt câu hỏi)

->..................................................................................