[解析]
(1)主旨大意题。根据第一段的疑问句Do you know how it is when you see someone yawn and you start yawning too?Or how hard it is to be among people laughing and not laugh yourself? (你知道当你看到别人打哈欠时自己也开始打哈欠是什么感觉吗?或者置身于大笑的人群中却不笑自己有多难?)及最后一段的Research into mirror neurons seems to provide us with ever more information concerning how humans behave and interact. (对镜像神经元的研究似乎为我们提供了更多关于人类行为和互动的信息。)可知,本文主要告诉我们mirror neurons的作用,B项Functions of mirror neurons.(镜像神经元的功能。)能概括文章大意。A.Existence of mirror neurons.镜像神经元的存在;B.Functions of mirror neurons.镜像神经元的功能;C.Ways to find mirror neurons.寻找镜像神经元的方法;D.Problems of mirror neurons.镜像神经元的问题。故选B。
(2)推理判断题。根据第二段第一句话Put simply,the existence of mirror neurons suggests that every time we see someone else do something,our brains imitate it,whether or not we actually perform the same action. (简单地说,镜像神经元的存在表明,每当我们看到别人做某事时,我们的大脑就会模仿它,不管我们是否真的做了同样的动作。)可知,镜像神经元可以解释为什么我们看到别人微笑时也会微笑。故选D。
(3)词句猜测题。根据第三段的A group of researchers discovered that if they gave people sentences to listen to (for example: "The hand took hold of the ball") (一组研究人员发现,如果他们让人们听句子(例如:"手握住球"))和when the action was actually performed (in this example,actually taking hold of a ball) (当这个动作真正被执行时(在这个例子中,实际上是抓住一个球))可知,他们在做出句子描述的动作时镜像神经元被触发,因此划线词triggered的意思是"触发",和set off相近。A.cut off.切断;B.set off.触发;C.built up.建立;D.broken up.分手。故选B。
(4)推理判断题。根据最后一段第一句Research into mirror neurons seems to provide us with ever more information concerning how humans behave and interact. (对镜像神经元的研究似乎为我们提供了更多关于人类行为和互动的信息。)可知,镜像神经元与人类行为和互动有关,故选A。