Unit 3 The Million Pound Bank Note grammar课时作业

第一节.七选五

　　[2019·陕西省摸底检测]

　　Are Your Clothes Causing Pollution?

　　Very small pieces of plastic, called microfibers, are polluting rivers and oceans. __1__ Clothes worn for outdoor activities and exercise are often made of artificial materials, which are useful in keeping warm. But they contain very small plastic fibers, which may also be harming the environment when you wash them. When people wash these clothes, very small pieces go down the drain (下水道) with the wash water.

　　__2__

　　Pollution caused by plastic is not new, but recent studies have shown the effect of microfibers on the environment. Studies show microfibers are ending up in our waters, which may come from waste water treatment factories. A 2015 study found them in fish from California.

　　Microfibers' effect on food supplies

　　Beyond the waterways, the researchers say microfibers may end up in soil and agricultural lands. __3__ This means there is much to be learned about microfibers and the environment.

Some studies have shown that microfibers end up inside sea animals, like oysters. __4__ Researchers say that the fibers tend not to move into the tissue of the fish, but it needs more study.