语法填空: Since 61 first fully artificial plastic was invented in 1907, humans 62 (find) innumerable uses for the material. It has found 63 (it) way into our tools, our clothes and even our bodies. In a new study in 64 (environment) science and technology, researchers estimate the average American eats more than 50,000 pieces of microplastic particles, 65 (small) than 5 millimeters in length every year and breathes in another 50,000. Although the health 66 (effect) of consuming these tiny bits of plastic are unclear, researchers stress the real volume that people are 67 (casual) swallowing is alarming. The largest contributor came 68 drinking bottled water, in 69 the bottle itself added more than 32 times more plastic to a diet 70 (compare) with tap water, The Guardian reports.