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1、单元质量评估(四)时间：100分钟分数：120分第一部分阅读理解(共两节，满分40分)第一节(共15小题；每小题2分，满分30分)阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。AWe have all heard these words：“just put on a happy face”or“turn that frown upside down”Can the simple act of smiling actually make us feel better?Our face is formed by a variety of rather thin bones.
2、The muscles that attach to these bones become smaller when we are happy or when we want to laugh.The resulting facial expression is universally recognized as a smile and indicates our positive emotional status.Sometimes，people present fake (假的) smiles.But how does the brain achieve both types of smi
3、les using the same facial muscles? It all depends upon which part of the brain starts the smile.If the brains dopamine neurons(多巴胺能神经元) start the smile，then the smile looks sincere.If the brains motor cortex starts the smile，in other words，if we are consciously willing ourselves to smile，then a slig
4、htly different set of facial muscles are activated.It can be difficult to describe precisely how real and fake smiles differ，but we are all very capable at knowing the difference.But can forcing yourself to smile produce the same kinds of good feelings as a real smile does?Anything that prompts the
5、release of dopamine in the brain brings pleasure.For example，cocaine and coffee both release dopamine in the brain.The release of dopamine in the front half of our brain is accompanied by a real smile.But can this process be reversed? What about putting on that happy face? Can the simple act of smil
6、ing bring pleasure? Yes.When we smile，fake or real，the contraction of the facial muscles slightly distorts (扭曲) the shape of the thin facial bones.This slight distortion in their shape leads to an increase in blood flow into the brain and then increases the release of dopamine.As a result，walking ar
7、ound all day with a smile on your face will make your mood happier.Not only will you be happier but your smile might lead to the release of dopamine in someone elses brainnow that truly shows the power of a smile.【语篇解读】我们经常说，面带微笑不仅可以让自己快乐，也会让别人感受到快乐。本文就围绕微笑是如何使人快乐的进行了论述。1When we smile sincerely，_Abo
8、nes in our face become thinBmuscles in the face become smallerCthe brains dopamine neurons stop workingDthe brains motor cortex starts to work解析：细节理解题。根据第二段第二句“The muscles that attach to these bones become smaller when we are happy or when we want to laugh.”可知，答案为B项。答案：B2What is the RIGHT order of t
9、he following actions?more blood flows into the brainsmileshape of the thin facial bones is distortedrelease of dopamineABC D解析：细节理解题。根据最后一段“When we smile.slightly distorts(扭曲)the shape of the thin facial bones.”和“.leads to an increase in blood flow into the brain and then increases the release of do
10、pamine.”可知，答案为A项。答案：A3What can we conclude from the passage?AReal and fake smiles are started by the same part of the brain.BIts hard to know the difference between real and fake smiles.CWe cant affect the release of dopamine in others brain.DWe should try to smile even though we are not very happy.
11、解析：推理判断题。根据第四段“What about putting on that happy face？Can the simple act of smiling bring pleasure？Yes.”和最后一段内容可推断，答案为D项。微笑能给我们带来快乐，所以不管高兴与否，都要面带微笑。答案：DBIn England recently three foreign gentlemen came to a bus stop and waited.About five minutes later，the bus they wanted came along.They were just goi
12、ng to get on when suddenly there was a loud noise behind them.People rushed onto the bus and tried to push them out of the way.Someone shouted at them.The bus conductor came rushing down the stairs to see what all the trouble was about.The three foreigners seemed all at_sea and looked embarrassed.No
13、 one had told them about the British custom of lining up for a bus that the first person who arrives at the bus stop is the first person to get on the bus.Learning the language of a country isnt enough.If you want to have a pleasant visit，find out as much as possible about the manners and customs of
14、 your host country.You will probably be surprised just how different they can be from your own.A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table.The left hand is supposed to be used for washing yourself.Also in India，yo
15、u might see a man shaking his head at another to show that he doesnt agree.But in many parts of India a shake of the head means agreement.Nodding your head when you are given a drink in Bulgaria will most probably leave you thirsty.【语篇解读】文章以一个小故事作为开头，向我们介绍了英国人的乘车习惯，并进一步向我们介绍了不同国家的风俗习惯。5The British p
16、eople tried to push the three gentlemen out of the way，because the gentlemen _Awere foreignersBdidnt have ticketsCmade a loud noiseDdidnt line up for the bus解析：细节理解题。由第一段的“No one had told them about the British custom of lining up for a bus that.on the bus.”可知，英国人因为这三位外国人没有排队而将他们推到一边。答案：D6According to the article，i
