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.

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.
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.

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.
选B ,remember to do 记得去做某事,意思是“在我离开办公室前记得要去关门,但忘了去关灯”（时间是离开办公室之前,当时记得的应该是“去关门”,而不是“记得关了门）
另外,如果选A的话C也对,因为它们两个都表示”记得做了某事“

B

选A
remember doing 是“记得做过某事”,表示这件事情已经做过了
remember to do 是“记住去做某事”,表示这件事情还没有做
这里也不需要用完成时态，所以选A

此题的关键是：before i left the office在我离开办公室之前，说明“lock the door关门”这事还没做。而且remember to v. 表示记得去做，remeber v.ing 表示记得做了。正确答案：B. to lock