1.have an ace in the hole
握有王牌,很有把握
When you have the ace in your hand,you have something which you can use to gain an advantage when you need it.have an ace in the hole(American)

2.a class act
（在运动或演艺方面）很出色的人
I have been tracking Neil for a year,he is a class act and I have got a lot respect for his ability.
我已跟踪尼尔一年，他是个出色的家伙，我很崇拜他的能力。

3.break one’s back
努力地工作来源：考试大
When you’re breaking your back to make an enterprise work,it’s going to cut into your time with family.
当你全身心投入工作的时候，会侵占到家庭生活的时间。

4.get someone’s back up
激怒某人来源：考试大
What does get my back up is a girlfriend who gets too jealous if someone else finds me attractive.

5.hat in hand
求助，乞讨
He ended up going hat in hand to the neighbours.
他沦落到向邻居乞讨。来源：考试大

6.in the cards
可能发生
He believes an invasion was never in the cards.
他相信入侵永不会发生。

7.a change of heart
态度的改变来源：考试大

8.get no change out of someone
从某人处没有得到任何帮助
You won’t get any change out of him,so don’t expect it .
你不会从他那儿得到任何帮助，别指望了。

9.chapter and verse
所有细节
The instruction gives you chapter and verse
使用说明给出了所有细节。来源：考试大

10.cut to the chase
言归正传
He talked about the need to see all points of view,then he cut to the chase.

11.cut a dash
（外表）给人留下深刻印象来源：考试大
Tania cut a daring dash with a dress slashed almost to the waist .

12.in the dark
一无所知；蒙在鼓里来源：考试大
keep somebody in the dark
不让某人知道