阅读下面材料, 在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
Happiness is like a small stone dropped into a pool to cause a circle of ripples. ___41___ Stevenson has said, being happy is a duty. There is no exact definition of ___42___word “happiness”. Happy people are happy ___43___ all sorts of reasons. The key is not wealth or physical well-being, since we find beggars, the disabled and so-called ___44___( fail ), who are extremely happy. ___45___(stay) happy is satisfaction of soul and character.___46___is not selfish to try to achieve it. It is, indeed, a duty to ourselves and others.
Being ___47___(happy) is like an infectious disease. It causes people to stay away from the sufferer. He soon finds himself alone and sad. There is, ___48___,a cure for it: if you don’t feel happy, pretend to be!
It ___49___ (work) Before long you will find that you attract people. You discover how deeply rewarding it is to be the center of wider and wider circles of good will. Then the make-believe becomes a reality. You become ___50___(real) happy.
【答案】41. As 42. the
43. for 44. failures
45. Staying
46. It 47. unhappy
48. however
49. works 50. really
【解析】
本文是一篇说明文。文章主要介绍了快乐的本质和重要性，得到快乐的最简单的方法就是假装快乐。
【41题详解】
考查定语从句。句意：正如Stevenson所说，快乐是一种责任。此处为as引导的非限定性定语从句，as有“正如”之意。注意首字母大写。故填As。
【42题详解】
考查冠词。此处表示特指“happiness”这个词的定义，所以用定冠词the。故填the。
【43题详解】
考查介词。句意：高兴的人因为各种各样的理由而高兴。介词for表示“因为”之意。故填for。
【44题详解】
考查名词。此处与beggars和the disabled是并列关系，名词failure表示“失败的人”，是可数名词，与前面的并列名词同样用复数形式。故填failures。
【45题详解】
考查非谓语动词。分析句子结构可知，句子缺少主语，所以此处用动名词作主语。注意首字母大写。故填Staying。
【46题详解】
考查代词。句中用it作形式主语，真正的主语为不定式to try to achieve it.。故填It。
【47题详解】
考查形容词。句意：不快乐像一种传染病，根据后面的like an infectious disease.，结合句意可知，此处应用happy的反义词。故填unhappy。
【48题详解】
考查副词。句意：然而，有一种治疗方法:如果你不快乐，就假装快乐! 结合句意可知，这里表示转折，又因为空格前后都有逗号，所以用副词however。故填however。
【49题详解】
考查时态。句意：这很起作用。根据文章可知，这里用一般现在时。It作主语，谓语动词用第三人称单数形式。故填works。
【50题详解】
考查副词。形容词happy前用副词形式修饰。故填really。
Happiness is like a small stone dropped into a pool to cause a circle of ripples. ___41___ Stevenson has said, being happy is a duty. There is no exact definition of ___42___word “happiness”. Happy people are happy ___43___ all sorts of reasons. The key is not wealth or physical well-being, since we find beggars, the disabled and so-called ___44___( fail ), who are extremely happy. ___45___(stay) happy is satisfaction of soul and character.___46___is not selfish to try to achieve it. It is, indeed, a duty to ourselves and others.
Being ___47___(happy) is like an infectious disease. It causes people to stay away from the sufferer. He soon finds himself alone and sad. There is, ___48___,a cure for it: if you don’t feel happy, pretend to be!
It ___49___ (work) Before long you will find that you attract people. You discover how deeply rewarding it is to be the center of wider and wider circles of good will. Then the make-believe becomes a reality. You become ___50___(real) happy.
【答案】41. As 42. the
43. for 44. failures
45. Staying
46. It 47. unhappy
48. however
49. works 50. really
【解析】
本文是一篇说明文。文章主要介绍了快乐的本质和重要性，得到快乐的最简单的方法就是假装快乐。
【41题详解】
考查定语从句。句意：正如Stevenson所说，快乐是一种责任。此处为as引导的非限定性定语从句，as有“正如”之意。注意首字母大写。故填As。
【42题详解】
考查冠词。此处表示特指“happiness”这个词的定义，所以用定冠词the。故填the。
【43题详解】
考查介词。句意：高兴的人因为各种各样的理由而高兴。介词for表示“因为”之意。故填for。
【44题详解】
考查名词。此处与beggars和the disabled是并列关系，名词failure表示“失败的人”，是可数名词，与前面的并列名词同样用复数形式。故填failures。
【45题详解】
考查非谓语动词。分析句子结构可知，句子缺少主语，所以此处用动名词作主语。注意首字母大写。故填Staying。
【46题详解】
考查代词。句中用it作形式主语，真正的主语为不定式to try to achieve it.。故填It。
【47题详解】
考查形容词。句意：不快乐像一种传染病，根据后面的like an infectious disease.，结合句意可知，此处应用happy的反义词。故填unhappy。
【48题详解】
考查副词。句意：然而，有一种治疗方法:如果你不快乐，就假装快乐! 结合句意可知，这里表示转折，又因为空格前后都有逗号，所以用副词however。故填however。
【49题详解】
考查时态。句意：这很起作用。根据文章可知，这里用一般现在时。It作主语，谓语动词用第三人称单数形式。故填works。
【50题详解】
考查副词。形容词happy前用副词形式修饰。故填really。
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