【题目】It is most instructive lecture that I _______ since I came to this school.
A.attended
B.had attended
C.am attending
D.have attended

【答案】D
【解析】考查动词时态。句意，这是自从我来到这个学校以来，听过的最有教育意义的讲座。根据时间状语 “since I came to this school”可以看出要与现在完成时连用。故选D。