Ancient Greek philosopher Aristotle viewed laughter as“a bodily exercise precious to health.”But---_____some claims to the contrary,laughing probably has little influence on physical filness Laughter does_____short-term changes in the function of the heart and its blood vessels,____heart rate and oxygen consumption But because hard laughter is difficult to____,a good laugh is unlikely to have_____benefits the way,say,walking or jogging does.____,instead of straining muscles to build them,as exercise does,laughter apparently accomplishes the____,studies dating back to the 1930’s indicate that laughter.muscles,Such bodily reaction might conceivably help____the effects of psychological stress.Anyway,the act of laughing probably does produce other types of______feedback,that improve an individual’s emotional state.______one classical theory of emotion,our feelings are partially rooted_______physical reactions.It was argued at the end of the 19th century that humans do not cry______they are sad but they become sad when te tears begin to flow.Although sadness also_______tears,evidence suggests that emotions can flow_____muscular responses.In an experiment published in 1988,social psychologist Fritz Strack of the University of würzburg in Germany asked volunteers to____a pen either with their teeth-thereby creating an artificial smile–or with their lips，which would produce a（n）_____expression.Those forced to exercise their enthusiastically to funny catoons than did those whose months were contracted in a frown，_______that expressions may influence emotions rather than just the other way around____，the physical act of laughter could improve mood.
空格要求填入一个动词，并且与后面的to构成固定搭配。本句的意思是：那些被强制锻炼笑肌的人比那些嘴唇皱着表情失望的人在观看有趣的动画片时?更加丰富。即用牙咬住一支笔的人对动画片的反应更丰富。四个选项中[A]adapted to“变得习惯于……,?使适应于”，[B]catered to“迎合，满足某种需要或要求”，[C]turned…to“转向”，均不符合语境，[D]reacted to“对……做出反应”，是正确答案。
