Paragraph Two Inside your nose, there are hundreds of tiny hairs. These hairs filter the air you breathe. Sometimes dust and pollen find their way through these hairs andbother your nasal passages. The nerves in the lining of your nose tell your brain that something is invading your body. At this moment you usually sneeze. 37. An automatic r__________of our body.
【正确答案】：reaction/ response
【题目解析】：本段介绍了喷嚏发生的生理机制。鼻腔中的鼻毛在呼吸时起到过滤空气的作用。当灰尘和花粉穿过鼻毛影响鼻腔时，鼻腔里的神经就会通知大脑有异物入侵身体。此时就会打喷嚏。可见打喷嚏是身体的一种自然的反应。因此正确答案为 reaction或者response。
