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 attended7．若汽车的加速度方向与速度方向一致，当加速度减小时，则（　　）A．汽车的速度也减小B．汽车的速度仍在增大C．当加速度减小到零时，汽车静止D．汽车的位移不断减小