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Lesson  20


                 Exercise




                    What is the missing word in the sentence?










                           forests                    extinct                             living

                                             mining                 provide






                    1.   Man should take care of every ____________ creature on earth.


                    2.   Plants ____________ us food, clothing, and shelter.


                    3.   Many animals have gone _____________ because of man’s greed.



                    4.   Green _____________ are continuously ruined by illegal loggers.


                    5.   _______________ has also destroyed the mountains and rivers.














































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