Unit 4 Why don’t you talk to your parents-八年级下册英语同步分级阅读(人教版)

难度：容易 【语篇来自二十一世纪学生英文报·试题原创】 What are people’s eyebrows saying? Straight or arched (弯的), thick or thin—eyebrows come in many shapes and sizes. But what are eyebrows even for? They don’t keep us warm like our hair, or help us breathe like our nose. So why do we have them at all? Researchers from the University of York in the UK believe that eyebrows helped us communicate better when we were still evolving (进化). Early humans had large brow ridges (眉骨). This helped them show their strength. Later, as the human face evolved to become smaller and flatter, our eyebrows allowed us to express complex (复杂的) emotions, as well as better understand others’ emotions, the Guardian reported. A quick flash of the eyebrows, for example, is a sign that someone is willing to interact (互动) with others, while pulling our eyebrows up in the middle is an expression of sympathy (同情), Penny Spikins from York University told The Daily Telegraph. If you still find this hard to understand, just draw a simple face on a piece of paper and draw a line above the eyes. You can draw lines in different shapes and directions. You will find that it is very easy to show anger, fear, or surprise in a face. But this is not the only purpose of our eyebrows. They can also protect our eyes. Their arched shape can help to move rain or sweat around to the sides of our faces, keeping our eyes dry, the BBC reported. Together with our eyelashes (眼睫毛), eyebrows can also help to keep dust and other things out of our eyes. Some researchers believe that if we didn’t have eyebrows, we would have evolved some other facial feature to perform the same functions (功能). That could make us look quite different. 【导语】本篇是一篇说明文。文章介绍了眉毛的多种功能，比如表达情绪、保护眼睛等。 【单选】 1. ____ can keep people warm. A. Eyebrows B. Hair C. Nose D. Mouth 【答案】B 【解析】细节理解题。根据“They don’t keep us warm like our hair ...”可知，头发可以帮助人们保暖。故选B。 2. The brow ridges were ____ early. A. large B. thin C. small D. flatter 【答案】A 【解析】细节理解题。根据“Early humans had large brow rid