I remembered         the door before I left the office, but forgot to turn off the lights. 
#88593
A
locking
B
to lock
C
having locked
D
to have locked
推荐题目
The waters off the Diaoyu islands, first _____ in Ming Dynasty, are our traditional fishing area. 
#96574
A
discovered
B
discovering
C
being discovered
D
having discovered
Each button, when ____, provides a piece of beautiful music.
#88692
A
clicked
B
having clicked
C
clicking
D
being clicked
The book __ by him is difficult __.
#97404
A
wrote; understanding
B
written; to be understood
C
writing; understand
D
written; to understand