◎ 题干
Great changes have taken place since China _______ WTO.
[     ]
A. entered into  
B. entered  
C. has entered          
D. has entered into
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Great changes have taken place since China _______ WTO.[ ]A. entered into B. entered C. has enteredD. has entered into …”主要考查了你对  【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。