—Henry doesn’t seem like the same person.

—      so much in the war has made him more thoughtful.

A．For him to see

B．His seeing

C．Having seen

D．To be seeing

类风湿关节炎的原发病变是

A．透明软骨退行性变
B．骨赘形成
C．非特异性滑膜炎
D．关节囊纤维变性增厚、挛缩