单选题 When listing his previous experience the writer discovers there are some ______.

【正确答案】 A
【答案解析】[解析] 文章最后指出:However hard I try,there always seems to be a year or two for which I cannot satisfactorily account and which I am certain,if left blank,will give the impression that I was in prison or engaged in some occupation too dubious to mention.大意是:无论作者怎么努力,在填写表格中的先前经历一栏时,往往会出现某一时期是他无法做出令人满意的解释的,但是他清楚如果某一时期的工作经历没有具体注明,则可能被怀疑那段时间是在坐牢或者是在从事某种不为人知的活动。account是动词,此处做“解释”讲。所以正确答案应该是A。