第5题: [单项选择]In some eases, your instructor may tell you the topics ______ or may give you a choice of top. les to write about. A. in advance B. ahead of C. above all D. right away 参考答案:A 答案解析:句意:在有些情况下,你的导师会事先告诉你题目或把题目给你由你选写。in advance意为“事先,预先”;ahead of意为“在…之前”;above all意为“尤其,最重要的是”;right aw