2. 外语
  3. Complete the summary using the list of words, A-K, below. Write the correct letter, A-K, in boxes 7-10 on your answer sheet. Som

Complete the summary using the list of words, A-K, below. Write the correct letter, A-K, in boxes 7-10 on your answer sheet. Som

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问题 Complete the summary using the list of words, A-K, below.
Write the correct letter, A-K, in boxes 7-10 on your answer sheet.
Some scientists believe that laughter first developed out of【R1】______. Research has revealed that human and chimp laughter may have the same【R2】______. Scientists have long been aware that【R3】______laugh, but it now appears that laughter might be more widespread than once thought. Although the reasons why humans started to laugh are still unknown, it seems that laughter may result from the【R4】______we feel with another person.
A combat B chirps C pitch
D origins E play F rats
G primates H confidence I fear
J babies K tickling
【R4】
选项
答案H
解析 利用细节信息“reasons…still unknown”及顺序性原则定位于原文第五段。第五段第一句话“All this still doesn’t answer the question of why we laugh at all”对应题目中的“the reasons why humans started to laugh are still unknown”，同时原文中提及“laugh—ter in response to tickling is a way for two individuals to signal and test their trust in oneanother”，笑是人类之间显示相互信任的一种表现，所以正确答案为H(confidence，对应原文中的trust)。
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