III. Use the correct form of the word given in each sentence 1.All people happily live in the .......................,unpolluted enviroment with clean air and water. (health) 2.We must take care of the enviroment for ourselves and for the next ................................(generate) 3. Why are ...........................studying ways to convert the underwater ? (science) 4.Our source of energy will be used up if we go on ...............................it. (waste) 5.What can we do to pay less for ..............................? –You should use it when necessary. (light ) 6.The search for alternative resources of energy has led in .................................... directions. (vary) 7. There will be a ...............................of electricity if we don’t save it. (short ) 8. ......................................., we have done many things to protect the environment. (ultimate ) 9. There are a lot of technological..............................................designed to save energy.(innovate) 10.Mr. Longis concerned about the ......................................of natural resources. (conserve)