I haven’t seen this since I collected stamps.A. as old a stamp asB. so an old stamp as C.

问题补充：

I haven’t seen this since I collected stamps.

A. as old a stamp as

B. so an old stamp as

C. stamp as old as

D. as an old stamp a

答案：

(答案→)A. as old a stamp as

B. so an old stamp as

C. stamp as old as

D. as an old stamp a

解析：表示“象这么旧的邮票”可用以下形式表达：as old a stamp as this； a stamp as old as this；否定句中前一个as可用so。