My uncle used _____ a very good football player, but this was a long time ago. [ ]

A. to being

B. being

C. be

D. to be

以下哪项是最佳的治疗方案

A．拔除后可摘局部义齿修复
B．拔除后固定桥修复
C．根管治疗后桩冠修复
D．根管治疗后覆盖义齿修复
E．拔除后种植义齿修复