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
答案:B
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
答案:B