【题目】I remembered __________ the door before I left the office, but forgot to turn off the lights.
A. locking B. to lock
C. having locked D. to have locked
在线课程【答案】B
【解析】句意：我记得在离开办公室前要锁门，但是忘了关灯。remember to do sth. 意为“记得要去做某事”，remember doing sth. 意为“记得做过某事”。根据句意可知选B。