It is the most instructive lecture that since I came to this school.　　A attended B had att

问题补充：

It is the most instructive lecture that since I came to this school.

A attended B had attended C am attending D have attended

答案：

解析：本题考察时态。句意为这是从我来到这所学校到现在听过的最具启发性的讲座。从过去延续到现在的动作，故选现在完成时，选D；