13．There is an English saying that"Laughter is the best medicine．"Until recently，few people took the saying seriously．Now however，doctors have begun to look into laughter and the effects it has on the human body．They have found that laughter can really improve people's health．
Tests were carried out to study the effects of laughter on the body．People watched funny films while doctors checked their hearts，blood pressure，breathing and muscles．It was found that laughter has similar effects to physical exercise．It increases blood pressure，makes the heart beat more quickly and makes people breathe deeper； it also works on several groups of muscles in the face，the stomach，and even the feet．If laughter exercises the body，it must be beneficial．
Other tests have shown that laughter appears to be able to reduce the effects of pain on the body．In one experiment doctors produced pain in groups of students who listened to different radio programs．The group that tolerated （忍耐） the pain for the longest time was the group that listened to a funny program．The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain．
68．According to the passage，which of the following statements is WRONG？C
A．Laughter is good for health．
B．Laughter helps to reduce pain．
C．Laughter can make you become old quickly．
D．Laughter，just like physical exercise，is good for our bodies．
69．The underlined word"diminishes"in the third paragraph means"D"．
A．delays B．prevents C．increases D．reduces
70．Why do some doctors hold laughter clinics？B
A．Because they want to earn more money．
B．Because they want to improve their patients'condition．
C．Because they want their patients to practice how to laugh．
D．Because they think they will help the patients recover from illnesses．
71．What would be the best title for this passage？A
A．Laughter is the best medicine．
B．Laughter can reduce the effects of pain．
C．Laughter clinics help patients improve their condition．
D．Both laughter and physical exercise are good for health．
分析 本文主要講述通過美國醫(yī)生的研究，笑是最好的良藥．
解答 CDBA
68 C 推理判斷題．第一段最后一句They have found that laughter can really improve people's health．可知笑可以讓你變老是錯誤的，故選C．
69 D 詞義猜測題．從第三段最后一句The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain．可知笑可以幫助大腦產(chǎn)生一種可以減輕壓力和疼痛的化學(xué)物質(zhì)，故選D．
70 B 細(xì)節(jié)題． 根據(jù)文章第一段They have found that laughter can really improve people's health．可知笑可以改善病人的狀況，故選B
71 A 主旨大意題．從第一段 Laughter is the best medicine．可推知本文主要講述通過美國醫(yī)生的研究，笑是最好的良藥．故選A．
點(diǎn)評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進(jìn)行合乎邏輯的推理判斷．
