I must get to school before 8 am.A. leaveB. arrive atC. reachedD. Finished

问题补充：

I must get to school before 8 am.

A. leave

B. arrive at

C. reached

D. Finished

答案：

A. leave

(答案→)B. arrive at

C. reached

D. Finished

解析：句意：我必须上午八点前到学校。Get to抵达；A离开；B到达；C到达;D完成。句中有情态动词must所以动词要用原形，故选B。