这个题目考察的是remember + do的用法remember to do sth.表示记得做某事(有命令、祈使口吻)remember doing sth.表示记得做过某事(陈述状态)例句:I don't remember telling you about this.我不记得我告诉过你这事.Remember to tell me about this( ,please).(请)记得告诉我这个事!本题根据语境,选择remember to do形式.填to open.另外,其反义词忘记:forget,也有着同样的这两种用法,可以配合记忆.