Choose the option that best completes the following sentence.

6. Air ______________ is a serious problem in cities where there are big factories. A pollution​B wildlife ​C effect ​D tourism

7. The Friends of the Beach is organizing a campaign to clean ______________ the Front Beach. A. up​B. with​C. from​D. of

8. A lot of people ______________ trash into rivers and make the water polluted. A. throw​B. pass​C. shoot​D. kick

9. Plants and animals cannot grow and live well in ______________ areas. A. pollute ​B. polluted​ C. pollution ​D. pollutant

10. There are factories that ______________ broken glass and make it into new glassware. A. reduce ​B. produce​ C. waste​ D. recycle

11. Turning off the air conditioner ten minutes before leaving saves a lot of ______________. A. water​ B. electricity​ C. air​ D. plastic

12. If you ______________ enough water, you won't be thirsty. A drink​ B. drinks ​C. to drink ​D. drinking

13. Barry loves running, ______________ he is also a member of our school's running club. A. or​B. but​C. and​D. if 14. We should reduce the use of plastic ______________ that we can save the environment. A. to​B. for​C. so​D. because 15. She won't pass the exam if she ______________ hard. A. studies​B. doesn't study​C. will study​D. won't study 16. My father loves traveling, ______________ he never had a chance to go abroad. A. but​B. and​C. so​D. because 17. We won't complete the task on time unless we ______________ working hard. A. stop​B. keep​C. don't stop​D. don't keep