According to the research, laughing for a quarter of an hour can burn up to 40 calories, and if you laughed all day you'd do that or you might end up with a painful jaw. Ouch! Or you might find people looking at you in a funny way.

　　But I don't want to finish this article leaving you feeling desperate. Laughter comes naturally for most of us. Babies begin to laugh at around 3-6 months. So give in to your sense of humour and keep smiling. Life is short anyway.

　　Laughing too much may cause the following harmful results EXCEPT

　　.

　　Heart stop

　　B. diaphragm movement

　　C. lung burst

　　D. jaw dislocation

　　The underlined phrase “doo, and gloom” in Paragraph 2 probably means

　　.

　　Hopeless

　　B. funny

　　C. painful

　　D. nervous

　　How many calories can you use if you laugh for half a day?

　　A bout 40.

　　B. About 1,000.

　　C. About 2,000.

　　D. About 2,040.

　　What is the author's attitude towards laughing in the last paragraph?

　　Uninterested

　　B. Disapproving

　　C. Worried

　　D. Favorable

　　语篇解读

　　一项研究表明，笑并不是最好的良药，有时可能是有害的，笑可以消耗很多热量，尽管这样也不要放弃微笑，毕竟生活是短暂的。

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