—There were a dozen pens in this house, but I can hardly find one now.
    — ______. One is sure to turn up.
 
【正确答案】 B
【答案解析】 句意:—之前这间房子里有很多钢笔,但现在我几乎找不到一支。—继续找,肯定会找到一支的。考查交际用语。go on “继续”,keep looking for“继续找”,go ahead“继续吧”,keep from looking for“不要找”。根据句意答案选B。