All the students in our class ________ for two years.    

A. learned                              
B. have been learning    
C. learn                                
D. are learning
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科目：初中英語 來源：同步題 題型：單選題

All the students in our class ________ for two years.    
[     ]
A. learned                              
B. have been learning    
C. learn                                
D. are learning

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