At last the boy had no choice but ________ the bread from the supermarket. [      ]

A. admit to have stolen        

B. admit having stolen

C. to admit to have stolen     

D. to admit having stolen

有助于鉴别耳聋性质是蜗性病变还是蜗后病变的试验是（）。

A.骨导偏向试验

B.盖莱试验

C.气骨导比较试验

D.韦伯试验

E.阈上听功能测试