2．It seems hard to watch someone yawn（打哈欠） and not to yawn ourselves．Even reading about yawning can make you do it．Now，a new study has found why yawning has such a powerful force．Yawning when others yawn，the study suggests，is a form of social connection．Kids don't develop this behavior until around age four，the study found．Autistic（患自閉癥的）children are less likely to catch yawns．In the most serious cases，they never do．Yawning might help doctors to see whether the children are developing rightly．The work could also lead to a better understanding of the ways that people communicate and connect．
"Emotional（情緒的） effect seems to be a born thing that connects us together，"said Molly Helt，a graduate student at the University of Connecticut．"Yawning may be part of that．"Inspiration for her study came when she tried to get her own autistic son to clear his ears on an airplane．She repeatedly yawned at him，hoping he would yawn back．He never did．
"The fact that autistic kids don't do it might mean they're really missing out on that emotional connection with people around them，"she said．"The biggest thing people try to figure out after birth is how we become humans and understand that humans have minds that are different from others'，"she added．"Autistic people never seem to understand that．"
Like infectious （有感染力的）laughter and crying，scientists have found that yawning is a shared experience that improves social connection．Helt said it could fight stress after a period of being nervous and spread a feeling of calm through a group．
12．According to the passage，which of the following statements is True？B．
A．It is hard to yawn when you see others yawn．
B．Yawning is a form of communication．
C．Autistic children are more likely to catch yawns．
D．Yawning too much does harm to people's health．
13．In her study，Molly Helt has found thatB．
A．people get inspired when they yawn
B．yawning is a kind of emotional connection among humans
C．people only communicate with others by yawning when they are young
D．yawning helps clear ears on planes
14．From the passage，we can know thatD．
A．it is strange to yawn back if people around you yawn．
B．some kids are too young to yawn after others．
C．a(chǎn)utistic children yawn easily when others yawn．
D．yawning can be used to test children's development．
15．From the the last paragraph，it can be inferred thatD．
A．yawning is different from infectious laughter and crying
B．it is impolite to yawn on some social occasions
C．yawning is a shared experience that improves social connection
D．yawning can make people feel relaxed．
分析 這篇文章主要講了打哈欠是憐憫心和社會關(guān)系的一種表現(xiàn)形式，會在人與人之間相互傳染，打哈欠是人們之間的一種情感交流方式，是人們之間溝通的紐帶，打哈欠能使人放松．
解答 BBDD
12：B．細(xì)節(jié)理解題．根據(jù)文章第一、二段的描述可知打哈欠是憐憫心和社會關(guān)系的一種表現(xiàn)形式，會在人與人之間相互傳染．故A正確．
13：B．細(xì)節(jié)理解題．結(jié)合文章三、四段可知Helt通過患有自閉癥的兒子對打哈欠"啟而不發(fā)"的情況意識到打哈欠是人們之間的一種情感交流方式，是人們之間溝通的紐帶．故B正確．
14：D．細(xì)節(jié)理解題．根據(jù)第一段Kids don't develop this behavior until around age four，the study found．以及Yawning might help doctors to see whether the children are developing rightly．可知，打哈欠可以用來檢測孩子的成長；故D正確．
15：D．推理判斷題．根據(jù)Helt said it could fight stress after a period of being nervous and spread a feeling of calm through a group可知答案．故D正確．
點評 考查學(xué)生的細(xì)節(jié)理解和推理判斷能力．做細(xì)節(jié)理解題時一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確選擇．在做推理判斷題時不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進(jìn)行合乎邏輯的推理判斷．
