【由来“揭秘”】

　　

　　【即学即练】

　　When your friend yawns as you chat, don’t be angry. For, far from being a sign of boredom, yawning may signal empathy (同感).

　　Scientists believe that contagious (简略感染别人的) yawning— yawning __1__ someone else does —is a sign of being very interested in the first person’s thoughts and feelings. This is the theory of Italian researchers who __2__ more than 100 men and women from four continents as they went to work, ate in restaurants and sat in the waiting room. When one of the volunteers yawned, the researchers noted whether anyone within 10 feet yawned within the next three minutes. Their results showed that race and __3__ had no effect on whether the uncontrollable urge to yawn was __4__. But how well the two people knew each other did.

　　A reciprocal (彼此的) yawn was most likely to occur among family members, then friends, then acquaintances. The phenomenon was __5__ common among strangers, the journal PLoS ONE reports.

　　The University of Pisa team concluded that contagious yawning is driven by how emotionally (豪情上的) __6__ we are to someone and so how likely we are to share the same feeling with them. They say there are other reasons to link yawning with empathy.For example, we start to “catch” yawns from the age of four or five, around the time when we __7__ the ability to identify each other's emotions properly.

　　Studies also show that those easily influenced by contagious yawning are better at knowing __8__ others are thinking about from their faces.

　　Most animals, including snakes and fish, yawn, but it is only contagious in humans and chimps (猩猩) and, according to a recent study, dogs.The researchers, from the University of London's Birbeck College, put __9__ in a room with a yawning man and found that 21, or 72%, also started to yawn. They said the skill may allow the pet to build stronger __10__ with their owners.

　　1. A. when B. before C. while D. after

　　2. A. observed B. saw C. noticed D. watched

　　3. A. age B. sex C. profession D. health

　　4. A. passed on B. passed by C. passed away D. passed through

　　5. A. most B. more C. less D. least

　　6. A. distant B. different C. close D. fond

　　7. A. need B. lose C. control D. develop

　　8. A. what B. which C. how D. who

　　9. A. snakes B. fish C. cats D. dogs

　　10. A. beliefs B. bonds C. basis D. bodies

　　试题分析：当你和兄弟谈地利他在打欠伸，你不要生气。科学研讨标明，打欠伸是可以彼此感染的。

　　1.【答案】D。解析：查询连词。A. when当……时;B. before在……之前;C. while在……时刻;D. after在……之后;根据语境可知当一自个打欠伸后，其别人也会跟着打欠伸，after契合语境，故选D。

　　2.【答案】A。解析：查询动词。A. observed调查;B. saw看见;C noticed留心;D. watched观看;这是研讨者调查了100多位来自四个大洲的男人和女士后得到的结论，observe指带着某种意图观看，故选A。

　　3.【答案】B。解析：查询名词。A. age年纪;B. sex性别;C. profession作业;D. health安康;调查的成果标明，种族和性别对想打欠伸没有影响，sex契合语境，故选B。

　　4.【答案】A。解析：查询动词短语。A. passed on传递;B. passed by经过;C. passed away去世;D. passed through经过;一自个先打欠伸股动其别人打欠伸，这种无法控制的激动是从第一自个那里传递过来的，pass on契合语境，故选A。

　　5.【答案】D。解析：查询比照等级。A. most最多地;B. more更多地;C. less较少地;D. least最少地;这种表象最不可以能发生在陌生人之间，用least构成最高档，故选D。

　　6.【答案】C。解析：查询描述词。A. distant间隔远的;B. different不一样的;C. close紧密的;近的;D. fond喜爱的;研讨标明，这种延伸性的打欠伸取决于咱们和某自个的联络亲近程度，A、B、D三项均与语境不符，故选C。

　　7.【答案】D。解析：查询动词。A. need需要;B. lose丢掉，失掉;C. control控制;D. develop培育，打开;在四五岁时咱们领会了打欠伸的意义，也就是在那时咱们培育了恰当地辨认彼此情感的才能，develop the ability to do sth.培育做某事的才能，故选D。

　　8.【答案】A。解析：查询联接词。A. what啥，代词;B. which哪一个(些)，代词;C. how如何，副词;D.who谁，代词;knowing后是一个宾语从句，该宾语从句中短少宾语，要用代词what作about的宾语，故选A。

　　9.【答案】D。解析：查询名词。A. snakes蛇;B. fish鱼;C. cats猫;D. dogs狗;下文讲的是一个用狗做的实验，上文的“it is only contagious in humans and chimps (猩猩) and, according to a recent study, dogs.”也提示了该处的答案，故选D。

　　10.【答案】B。解析：查询名词。A. beliefs主意，观念;B. bonds联络，枢纽;C. basis基础;D. bodies身体;研讨者认为，狗的这种技能可以让它们和主人树立更紧密的联络枢纽，build bonds with sb.与或人树立枢纽，故选B。

　　【解题顺口溜】