Ex 4: Word form 4._________elements have been found in both ground and underground water sources . (pollute) 5. Fish and many other animals are killed by_________in their habitats . (pollute) 6. Astronomers are concerned about light pollution because thay have______in viewing activities in the sky and outer space. ( difficult) 7. _____habitats have been destroyed in recent years . (nature) 8. A number of cleaning products contain _______chemical. (harm) 9. Water samples collected at these villages were seriously_______with bacteria. ( contaminate) 10.People believe that the_______water has brought cancer to the local resident . (pollute) 11. Light pollution makes us _________to see the stars in the sky.(able) 12. Noise is considered as__________pollution.(environment) 13. The_______of lake, rivers, oceans or underwater causes water pollution .( cotaminate) 14. The street dosen't look_____because it has a lot of rubbish .(attract) 15. Are all types of pollution_____to the health of human and animals. (harm) 16.The_____are concerned about the oil spills in the East Sea. (environment) 17. Dumping _____ waste into the lakes and rives has caused serious water pollution. ( industry) 18. Many people in this area have cholera because they drink_____water.(treat) 19. Examples of primary _______are exhaust fumes from cars, soot from smoke. (pollute) 20. If we use water____, more people will have fresh water.(care) 21. The polluted water resuilts in the_______of many aquaticanimals and plants. (die) 22. Both French and English are ______languages in Canada. ( office) 23. NSW is the ______of New South Wales , the most populous state in Australia. (abbreviate) 24. Do you know that the telephone , the televison , and penicillin are Scottish____? (invent) Nếu giải thích ctlhn + 5 Sao + cảm ơn