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
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