-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 查看更多

 

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— 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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