____  at my classmates' faces, I read the  same excitement in their eyes. [ ]

A. Looking  

B. Look  

C. Tolook  

D. Looked

骨瘤

A．好发于颅骨和下颌骨
B．好发于手和足的管状骨
C．好发于骶尾椎和颅底蝶枕部
D．好发于股骨下端、胫骨或腓骨上端和肱骨上端
E．好发于下肢长骨骨干