问题补充：
第三部分阅读理解(共10小题；每小题2分,满分20分)
How many times have you laughed today? Have you ever wondered what makes you laugh? In the whole animal kingdom, only we humans are capable (有能力的) of laughter. On average, we laugh about 17 times a day.
Laughter is a spontaneous reaction of the body to some-thing funny or pleasant. Have you noticed that when you laugh, many parts of your body respond (反应)? Your face changes expression, your breathing changes, and muscles throughout your body are affected.
An interesting story dates back to 1962. In a school in Tanganyika, in Africa, a group of schoolgirls started laughing uncontrollably over a joke. This laughter became epidemic (传染的), jumping from one person to the next, spreading across communities, and lasting for six months! So strong was the laughter epidemic that schools had to shut down till it ended.
How we laugh remains a mystery. Whatever the reasons, laughter, as the saying goes, is the best medicine. In fact, science has proven that being happy and laughing can not only keep us healthy and fit but help deal with serious illnesses.
Laughing exercises all the important muscles, and keeps you fit. People have started forming laughter clubs that use laughter to treat illnesses. They meet at specific places at fixed times and laugh together. Laughter spreads, so this exercise works best in groups; once one person starts laughing, others automatically (自动地) join in.
56. The underlined word spontaneous in the second paragraph probably means .
A. perfect B. strange C. naturalD. terrible
57. People have formed laughter clubs to .
A. kill time B. relax C. meet others D. keep healthy
58. The best title for the passage would be .
A. A Laughter Epidemic
B. Laughter, What It Is, and What It Can Do
C. The Relationship Between Laughter and Health
D. How Laughter Helps Cure Disease
59. The passage is probably taken from a(n) .
A. ad B. novel C. magazine D. medical book56---59 CDBC
答案：
(答案→)56---59 CDBC
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第三部分阅读理解(共10小题；每小题2分 满分20分)How many times have you laughed today? Have you ever wondered w
