问题
选择题
---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
答案
答案：B
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。