文档介绍：硕士硕士入学考试考研英语真题
Section I Use of English
Directions： Read the following text. Choose the best word（s） for each numbered blank and mark [A]， [B]， [C] or [D] on ANSWER SHEET 1. （10 points）
Ancient Greek philosopher Aristotle viewed laughter as “a bodily exercise precious to health.” But __1___some claims to the contrary， laughing probably has little influence on physical fitness Laughter does __2___short-term changes in the function of the heart and its blood vessels， ___3_ heart rate and oxygen consumption But because hard laughter is difficult to __4__， a good laugh is unlikely to have __5___ benefits the way， say， walking or jogging does.
__6__， instead of straining muscles to build them， as exercise does， laughter apparently accomplishes the __7__， studies dating back to the 1930‘s indicate that laughter__8___ muscles， decreasing muscle tone for up to 45 minutes after the laugh dies down.
Such bodily reaction might conceivably help _9__the effects of psychological stress. Anyway， the act of laughing probably does produce other types of ___10___ feedback， that improve an individual‘s emotional state. __11____one classical theory of emotion， our feelings are partially rooted ____12___ physical reactions. It was argued at the end of the 19th century that humans do not cry ___13___they are sad but they become sad when the tears begin to flow.
Although sadness also ____14___ tears， evidence suggests that emotions can flow __15___ muscular responses. In an experiment published in 1988，social psychologist Fritz Strack of the University of würzburg in Germany asked volunteers to __16___ a pen either with their teeth-thereby creating an artificial smile – or with their lips
， which would produce a（n） __17___ expression. Those forced to exercise their enthusiastically to funny catoons than did those whose months were contracted in a frown， ____19___ that expressions may influence emotions rather than just the other way around __20__ ， the physical act o