56-60)
One of the most important features that distinguish man from animal is the ability to laugh. People who
have studied the phenomenon have offered many (56) to explain human laughter. Scholars in the field of
psychology, for example, have done research on the (57) of what makes people laugh. But as usual happens,
the experts disagree, and there is much (58) in the field. Some people claim that human beings laugh at things
which are strange to their experience. Others feel that people laugh at what they (59) believe to be their own
weaknesses. Humor often (60) a knowledge of certain words, or even on an understanding of a particular
cultural background. There are, of course, many different sources of humor, but the important fact is that all
people share the great pleasure of laughter. 【題組】
56. (A) theories (B) escapes (C) solutions (D) forms