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                题目内容
                (广东开放大学-大学英语2)
            
            
                Some college students have volunteered回答
C
take care of the children.
A. in
B. at
C. to
D. with
                    
                    
                    
                
                
                
            
        C
take care of the children.
A. in
B. at
C. to
D. with
参考答案