◎ 题干
—How many English words had you learned _____ the end of last term?        
—Around 2000,but I’ve forgotten most of them.        
[     ]
A. by  
B. at    
C. to  
D. on
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— How many English words had you learned _____ the end of last term? — Around 2000, but I've forgotten most of them. [ ]A. by B. atC. to D. on …”主要考查了你对  【介词】  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。