—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

男，46岁，死髓牙，经根管治疗后以PFM全冠修复，经牙体制备取模后，在全冠初戴之前，尚需作的处理是（）。

A．用金属全冠作保护性修复

B．用塑料全冠作暂时保护性修复

C．不需作任何处理

D．制作活动义齿保持间隙

E．制作间隙保持器