There are three major forms of fossil fuels: coal, oil and natural gas. All three were formed many hundreds of millions of years ago before the time of the dinosaurs – therefore we call them fossil fuels.

       Fossil fuels take millions of years to make. But they are not unlimited. We are using up the fuels that were made more than 300 million years ago. They are not renewable like solar power, wind power, hydro power or biomass. Once they are gone they are gone. So, it’s best not to waste fossil fuels.

       We can save fossil fuels by conserving energy. One simple way to do this is to turn off appliances, TVs and radios that we are not using. We can also turn off lights when no one is in the room. Another way is to go by bike or walk instead of driving cars or motorbikes.

   A. Write true or false for the statements:

   1. Three major forms of fossil fuels are oil, coal and natural gas.                  ……………………..

   2. They were formed right after the time of dinosaurs.                                     ……………………..

   B. Answer the questions:

    1. How can we save fossil fuels?

      ……………………………………………………………………………………………………………….

    2. How long does it take to make fossil fuels?

      ……………………………………………………………………………………………………………….

    3. Is it best to waste fossil fuels?

      ……………………………………………………………………………………………………………….

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

1.   A. mention                  B. question                  C. action                      D. education

2.   A. populated               B. loaded                    C. harvested                D. lived

3.   A. community             B. computer                C. museum                  D. customs

4.   A. minority                  B. ethnic                      C. tradition                  D. religion

5.   A. festival                   B. man                         C. fat                           D. grand

6.   A. upset                       B. custom                    C. museum                  D. unsuitable

7.   A. saint                        B. tailor                       C. explain                    D. said

8.   A. beach                      B. catch                       C. church                     D. Christmas

Chuyển đổi câu:

1, Margaret stayed at home because her mother was sick

=> Because of....................................................................................................

2, I couldn't do the test because it was diffcult 

=> Because of .........................................................................................................

3, I couldn't read the letter because it was dark

=> Because of.......................................................................................

4, I can't study because it was noisy

=> Because of.............................................................................

5, The train come late because it was foggy

=> Because of.......................................................................................

6, The train was late becau the fog was thick

=> Because of..................................................................................

7, I can't sleep because the weather is hot

=> Because of .................................................................................

8, All the teacher love him because his couduct is good

=> Because of..................................................................................

9, Because there was a traffic accident, I went to shool late

=> Because of .....................................................................................

10, Because the shortage of meet, we had to live on beans

=> Because of........................................................................................

11, Because there was a lack of wather , many trees died rapidly

=> Because of.....................................................................................

V. For each question, complete the second sentence so that it means the same as the first. Use the word in brackets. You may need to change the word.

1. This is my car.

    This car _________________________. (MINE)

2. My mom drives me to school every day.

    I _________________________ car every day. (IN)

3. Tom always walks to school.

    Tom _________________________. (FOOT)

 4. How fast is that flying car?

     What _________________________ flying car? (SPEED)

5. 200 people can go in that new train.

   That new train _________________________. (CARRY