We walked a long way to see him off, only _____ that he had just left.

A．found

B．to find

C．finding

D．having found

下列哪项不是脊柱结核的X线表现()

A．相邻椎体破坏

B．椎间隙变窄、消失、椎体融合

C．边缘性、虫蚀样骨质破坏

D．腰大肌肿胀，可有钙化

E．骨赘、骨桥形成