【单选题】
            
 Despite repeated ______ by educational authorities for concrete measures to reduce students' burdens, little has changed.
A.directions
B.recommendations
C.advice
D.calls
        
        
			
            
            
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				根据网考网移动考试中心的统计,该试题:
2%的考友选择了A选项
10%的考友选择了B选项
7%的考友选择了C选项
81%的考友选择了D选项