【单选题】
            
 The chairman of the company said that new techniques had ______ improved their production efficiency.
A.violently
B.severely
C.extremely
D.radically
        
        
			
            
            
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				根据网考网移动考试中心的统计,该试题:
1%的考友选择了A选项
1%的考友选择了B选项
39%的考友选择了C选项
59%的考友选择了D选项