21 I have seen worse 我见过更糟的
22 in advance 提前;同义：before hand， ahead of time
It’s a really nice apartment. But the owners want two-month rent in advance and I just don ’t have it.
23 in case 万一
Let’s take our suits along in case the sun comes out.
24 in next to no time 马上
A： Are you going to be using the copying machine long?
B： I’ll be through in next to no time.
25 in the red 赤字 反义：in the black
26 in the works 正在准备阶段
An advanced course in theoretical chemistry is the works.
27 keep to oneself
I’m amazed that you still haven’t gotten to know your neighbors.
28 kill time 浪费时间
Gosh， what can we do to kill the next 10 hours?
29 leave…up to somebody
We’ll have to leave the decision up to him.
30 letter of recommendation 推荐信;letter of reference 推荐信
31 look on the bright sides of things 看事物的光明面
32 no kidding 不是开玩笑吧
33 on the tip of one’s tongue 就在舌尖
A： Are you sure you can’t remember the name of that record?
B： It’s just on the tip of my tongue!
34 quitting time 下课时间
I’m glad it’s almost quitting time.
35 take it over 重修
Don failed physics and had to take it over.
36 than necessary 比应该的要冷
The lab was cooler than necessary.
37 That’s easier said than done. 说来容易做来难
38 There is nothing to it. 没什么，很容易
I can run this projector. There’s really nothing to it.
39 with flying colors 成功
A： How did Ellen do on her American History exam?
B： She passed with flying colors.
40 You can bet your life 当然
A： Will Prof. Smith come to class on time?