单选题 This is one of the best students that I ______.
A. even have known B. have ever known
C. know D. knew

【正确答案】 B
【答案解析】[解析] 现在完成时表示迄今为止这一段时间的情况，一个影响现状的动作，刚刚结束的动作，过去的经验。其形式为have/has+过去分词。