【题目】—Does my son listen to the teacher attentively in class?
—Rarely, believe it or not, ________ him behave well in class.
A. did I see B. I saw
C. I have seen D. have I seen
在线课程【答案】D
【解析】考查时态和倒装。上句：我儿子上课时专心听老师讲课吗？下句：信不信由你，我很少见过他在课堂上表现很好。表示过去发生的动作对现在造成的影响用现在完成时态，否定词Rarely位于句子开头，句子用部分倒装。故选D。