2. 外语
  3. Man is the only animal that laughs. Why is this true? What makes us respond as we【C1】______ to pleasurable experiences? What is

Man is the only animal that laughs. Why is this true? What makes us respond as we【C1】______ to pleasurable experiences? What is

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问题      Man is the only animal that laughs. Why is this true? What makes us respond as we【C1】______  to pleasurable experiences? What is the history of this "happy convulsion", as someone once【C2】______  it, and just what is its function?
     We are not short【C3】______ theories to explain the mystery; for centuries, biologists, psychologists, and medical men have【C4】______  a definitive explanation of laughter. One writer theoried that its function is to intimidate others or to gain stature【C5】______  them by humiliating them. Another took the opposite view that we laugh in order not to cry. A psychologist offered the explanation that laughter functions as a remedy【C6】______  painful experiences, and that it serves to defend a person【C7】______ what the psychologist termed "the many minor pains【C8】______  which man is exposed". In the seventeenth century, a writer set【C9】______  the theory that we laugh when we compare ourselves with others and find ourselves superior; in effect, we laugh at the infirmities of others.【C10】______  every theory bas been concerned with either the structure or the function of laughter,【C11】______   relatively few have been devoted 【C12】______  the question of its origin. I propose to offer a theory which, so far as I am 【C13】______ , has not previously been set forth: that only those animals capable of speech are capable of laughter; and that therefore man, being the only animal that【C14】______  , is the only animal that laughs.
     Those of us who have observed chimpanzees closely feel quite confident that the chimpanzee occasionally【C15】______  behavior that looks very much like a primitive precursor of human laughter. This behavior, however, has been observed only in a human【C16】______  ; whether or not it occurs under natural【C17】______  is dubious; but the 【C18】______  fact that under any condition an ape is capable of such behavior is【C19】______  more than passing【C20】______ for does it not indicate that early man had the rudiments of laughter?
【C3】
选项 A、of
B、in
C、about
D、with
答案A
解析 此题考查介词用法。be short of是固定短语，意思是“缺乏、不足”，相当于lack of。We are not short of theories to explain the mystery．我们不乏解释这一神秘之事的理论。
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