不属于类风湿性关节炎病变特点的是（）。

A.急性坏死性动脉炎

B.滑膜下淋巴滤泡的形成

C.关节软骨表面血管翳的形成

D.Aschoff小体的生成

E.晚期关节的畸形

My brother is fifteen, but he talked as if he ________ the Long March.[ ]

A. had joined  

B. took part in

C. takes part in  

D. had taken part in