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                He studied very hard all the time because he didn‘t want to _____in his studies.(本题2.0分)
A、 fall behind
B、 e left ehind
C、 left behind
D、 Both A an B
                    
                    
                    
                
                
                
            
        A、 fall behind
B、 e left ehind
C、 left behind
D、 Both A an B
参考答案
 
                