—Do you know the tall boy with sunglasses?

—Yes, he is Jack Green and he is one of my friends. [ ]

A. a friend of mine

B. a friend of me

C. my friends'friend

D. my best friends

关节强硬（关节面之间有骨性或纤维组织连接）表现（）

A.主动和被动活动均正常

B.被动活动正常，而不能主动活动

C.主动和被动活动均不能

D.主动和被动活动均有部分障碍

E.被动活动正常，主动活动障碍