15 dirt cheap 非常便宜
A： You’ve already furnished your apartment?
B： I’ve found some used furniture that was dirt cheap.
16 do with 用………凑合; do without 没有……也行
You can do with your girlfriend.
You can do without your girlfriend
17 fall back on 依赖
A： Were you able to understand that French novel without any help from the teacher?
B： I did pretty well， but I had to fall back on my dictionary occasionally.
18 fill a prescription 按处方抓药
Would you please fill this prescription for me?
19 fill in for 代替; 同义：fill one’s place(position， shoes); take the place of; take over Say， Dave， can you fill in for me tonight at the restaurant? I’d like to go out of town.
20 food for thought 令人思考的东西;同义：thought-provoking
There is a lot food for thought in what he had to say.
21 for nothing 免费
To pay to see that movie would be foolish， when you can see it on TV for nothing.
22 from top to bottom 从上到下
A： Maybe you lost your wallet in this room.
B： I’ve searched it from top to bottom……
23 get of on the wrong foot 开始事情就做错了
I got off on the wrong foot， and I don’t have any idea which way to turn now.
24 get a lot out of something 从……学到很多
The training program was difficult， but she got a lot out of it.
25 get at 想说
Do you understand what I’m getting at?
26 get away with 对………摆脱惩罚
A： Did you know that Bob is leaving for home tonight? He isn’t planning to take his final exams.
B： He can’t get away with that
27 get going 赶紧行动; 同义：get moving
A： It looks like we won’t have enough time to do all we wanted to.
B： Who says we won’t? let’s get going.