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 as
【正确答案】：A
【题目解析】：【考点点击】本题考查so/as+adj.+a(an)+n结构。【要点透析】表示“像这么旧的邮票”可用as old stamp as this或 stamp as old as this的形式表达。否定句中前一个as可用so替换。
