The planet's water reserves are constantly polluted by (1) from agriculture, industries and sewers. Since water (2) always circulating through the environment, it transports the pollutants it (3) from one area to the next. A pesticide that is sprayed on a field, for example, seeps into the (4) finds to a stream and finally ends up in the ocean. These toxic (5) harm aquatic plants and animals and also infect the food chain, causing certain plant and animal (6) to become extinct. They can also contaminate humans (7) eat fish. Even though it is strictly forbidden to (8) garbage in the rean, many countries release their untreated sewer waste and dispose of their garbage (9) the water. In addition to this, more than 6 million tons of oil are accidentally (10) into the ocean every year. 1. A. food B. soil C. noise D. waste 2. A. has B. is C. will D. was 3. A. consists B. reduces C. contains D. follows 4. A. layer B. surface C. body D. groundwater 5. A. products B. factors C. substances D. outbreaks 6. A. species B. beings C. numbers D. categories 7. A. how B. who C. whose D. treat 8. A. dump B. hold C. bring D. whom 9. A. with B. behind C. into D. under 10. A. sprayed B. increased C. resulted D. spilled caan ạ