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16、Discovery in a South African cave suggests that modern human behavior _____ much earlier than _____.

     A. begin, previously thought                       B. began, previously thought

C. should begin, previous thinking               D. began, previous thinking

   

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三、完型填空

 

(每空? 分,共? 分)

 

 

16、 34.   

三、完型填空

 

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Discovery in a South African cave suggests that modern human behavior _____ much earlier than _____.

     A. begin, previously thought                       B. began, previously thought

C. should begin, previous thinking               D. began, previous thinking

   

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