IV. Give the correct form of the words given to complete sentences.

      1.   We should use them                             and try to find out                  ECONOMY                     alternative sources of power.

      2.   Solar energy is                        , plentiful and clean.                            RENEW

      3.   I think that solar energy can be an                               source of        ALTER                            energy in the near future.

      4.   We should reduce the use of                          at home.                     ELECTRICAL

      5.   It’s a clean source of energy. Sailboats couldn’t move without        POWERFUL                         this             .

      6.   Waves will be used as an                     friendly source of energy.      ENVIRONMENT

      7.   Limit car trips by relying on biking, walking, public                         TRANSPORT                                   .

      8.   Solar power can be used to                              or cool our houses.     HOT

      9.   Energy is used to                     a lot of electrical things.                    PRODUCT

      10. There will be a                         of energy in the near future.              SHORT

Rewrite these sentences, so that their meaning stays the same, beginning with the given words

1. What is the distance between Quang Ngai and HCM city ?

=> How far....................................................................................

2. I often walked to school when I was a student.

=> I used ..........................................................

3. We will develop alternative sources of energy.

=> Alternative sources of energy ...................................................................

4. Although the weather was bad, she went to school on time.

=> Despite ......................................................................................

VI . Give the correct form of the words given to complete the sentences :

1. Solar energy is renewable , ............ and clean . PLENTY

2. We should reduce the use of .......... at home . ELECTRICITY

3. Waves will be used as an ........... friendly source of energy . ENVIRONMENT

4. Solar power can be used to ............ or cool our house . HOT

5. There will be a ......... of energy in the near future . SHORT

6. Scientists are looking for clean and........ sources of energy. EFFECT

7. More renewable energy sources will be used to solve the problem of ........... POLLUTE