IV . Choose the collect answer A , B , C , or D to finish the sentences .
1 . We will cut down on the use of natural gas because it is . . . . . . . . . . . . . . . . . . and harmful to the environment .
A . plenty B . limited C . available D . abundant
2 . In many countries electricity , gas and water are .
A . sales | B . consumers C . necessities D . appliances
3 . Low energy light bulbs should be used to . . . . . . . . . . . . . . . . . electricity .
A . spend | B . buy C . convert D . save 4 . All the houses in our village will be . . . . . . . . . . . . . . . . . . . by solar energy .
A . heated B . heightened C . frozen D . widened
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