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题目
题型:不详难度:来源:
Jane _____ these families of chimps for many years and helped people understand how much they behave like humans.
A.had studiedB.studied C.studiesD.has studied

答案
D
解析
考查时态。现在完成时表示过去所发生的事情对现在的影响,在本句中体现出来了。句意:Jane已经研究了猩猩家族很多年了,并帮助人们理解猩猩有很多方面都像人类一样。
核心考点
试题【Jane _____ these families of chimps for many years and helped people understand 】;主要考察你对一般现在时等知识点的理解。[详细]
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