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                题目内容
                (国家开放大学英语语法)
            
            
                By the end of this term, we _______3,000 English words in all.
A.will learn
B.will have learned
C.learned
D.had learned
                    
                    
                    
                
                
                
            
        A.will learn
B.will have learned
C.learned
D.had learned
参考答案