We have found plastic in the ocean and in animals like birds, fish and whales. But for the first time, scientists have found plastic in human poop (大便) , USA Today reported. The findings came from a study led by scientists from Environment Agency Austria ___36___ The volunteers wrote down what they ate for a week and then provided a stool sample (大便样本) for testing.
_____37_____About 20 small plastic particles (IM) were found in every 10 grams (克) of stool. "The smallest plastic particles can enter the blood, the lymphatic system, and may even reach the liver (肝脏)," said Philipp Schwabl, who took part in the research. _____38_____They’re not sure how the plastic got in the volunteers' bodies, either. But most of the volunteers said they drank from plastic bottles and also ate seafood that could include plastic from ocean pollution.
In fact, plastic is everywhere around us. Every year, lots of plastic waste goes into the ocean. ____39____ Most of the particles stay in the ocean. Others can spread into the soil. and air. Could plastic in the air fall onto food and get into the human body?
Some past studies may also give us a clue. ______40______And even some drinking water has been found to have tiny plastic particles in it.
根据短文内容从方框中选出五个句子填入文中空缺处使短文内容通顺完整。

A. There, sunlight and waves (海浪) break the plastic waste down to very small pieces. B. The scientists are sure that the plastic must be harmful to humans. C. According to USA Today, 90% of sea salt which is sold in the world includes plastic. D. The scientists followed eight healthy volunteers from different parts of the world. E. However, the scientists aren't sure if the plastic is harmful to humans. F. Scientists found nine different kinds of plastic in the stool samples, according to the study.

【答案与解析】
【文章大意】我们在一些海洋动物中发现了塑料，而且最近科学家在人类粪便中也发现了塑料。为此科学家对一些志愿者做了实验，证明确实人体中含有塑料，并说明了塑料是如何进入海洋动物和人体的。
36. D  根据后文The volunteers wrote down what they ate for a week….既然这里提到志愿者，所以是科学家们对一些志愿者们进行了研究，结合选项这和D选项“科学家们跟踪了来自世界各地的八名健康志愿者”内容是一致的，故选D。
37. F  因为前文提到了科学家对8名志愿者进行了研究，所以这里要对研究结果进行说明，所以F “根据这项研究，科学家在粪便样本中发现了九种不同 塑料”，是研究结果，故选F。
38. E  根据后文They’re not sure how the plastic got in the volunteers' bodies, either. 他们也不确定塑料是如何进入志愿者体内的。这里提到了“也不确定”，所以前文是“不确定….”, 故这和E中“不确定塑料是否对人类有害”是对应的，故选E。
39. A  根据前文Every year, lots of plastic waste goes into the ocean. 每年都有大量的塑料废料流入海洋。所以这里要说明塑料进入海洋之后发生了什么，故这和A选项“在那里，阳光和海浪把塑料垃圾分解成很小的碎片。”是对应的，故选A。
40. C  根据后文even some drinking water has been found to have tiny plastic particles in it. 提到甚至在一些饮用水中也发现了塑料颗粒，所以这里在说“在….中存在塑料颗粒”，故这和C选项中的“90% of sea salt which is sold in the world includes plastic.”是对应的，故选C。
【点睛】本题属于选择句子补全短文，每个选项和上下文之间都有一定的联系，所以在写这类题目时阅读上下文，从上下文找出和选项之间的联系是至关重要的。例如第3小题，我们需要找的关键信息就是后文中的they are not sure….., either。既然在表达“也不确定…..”, 可以推测前面一定在说某件不确定的事情，对照选项，E选项中的 the scientists aren't sure 和此处是有联系的，故选E。