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                题目内容
                (赤峰学院-学前教育)
            
            
                21.  (单选题) Many beautiful fish are fast disappearing ______ the severe pollution.(本题3.0分)
A、 because of
B、 because
C、 now that
D、 when
                    
                    
                    
                
                
                
            
        A、 because of
B、 because
C、 now that
D、 when
参考答案