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                题目内容
                (四川大学大学英语(四))
            
            
                21. The number of students of this school__large.
A. are B. are not C.isn.t D.aren.t
                    
                    
                    
                
                
                
            
        A. are B. are not C.isn.t D.aren.t
参考答案
 
                