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
【R3】
选项
答案G
解析 利用细节信息“long been aware”及顺序性原则定位于原文第四段开头第二、第三句话“…animals might have been laughing long before that，More distantly related primates，including gorillas，laugh…”，所以正确答案为G(primates).
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