骨软骨瘤X线特征（）。

A.X线片示：骨膜板层状或葱皮状反应性骨形成和骨破坏

B.X线片示：长骨干骺端骨破坏和日光射线现象，有Codman三角

C.X线片示：自长骨干骺端突出的骨性病损

D.X线片示：骨端膨胀性溶骨性破坏

E.X线片示：短骨膨胀，有蜂窝状骨吸收区夹杂钙化斑块

Though difficult, I ________ him find a job, which made him very pleased.     [ ]

A. tried to help  

B. managed to help  

C. tried helping  

D. succeeded to help