俗话说“货比三家”，小敏在批发市场买一批铅笔，连跑了三家摊位．甲摊位5元买8枝；乙摊位5枝要3元；丙摊位7元买8枝送2枝．小敏在______摊位购买比较便宜．

At first, it seemed that everything went well, but all of         sudden, the ship hit       

iceberg.

A．a; an

B．a; the

C．the; the

D．/; an