---Try to remember to turn off the light when you leave the room.
---I’m trying to expenses.
A. keep off
B. keep down
C. keep out
D. keep from
网友回答
A. keep off
(答案→)B. keep down
C. keep out
D. keep from
解析：本题的含义是在你离开房间的时候要记住关灯，我会努力地控制开支费用的。Keep down表示控制的意思，故本题选B。