1) Have butterflies in one’s stomach 紧张

2) The rest is history.众所皆知

3) It never rains but it pours.祸不单行

4) Go fifty-fifty on something.平分

5) Suit yourself.随你高兴

6) Once in a blue moon.千载难逢；难得一次

7) Hang in there 坚持下去

8) Beat a dead horse. 白费劲

9) Never put off until tomorrow what you can do today. 今日事，今日毕

10) Take my word for it 相信我的话11) Save something for a rainy day 以备不时之需

12) It’s a deal 就这么定了

13) Speak of the devil说曹操曹操就到

14) You never know what you can do until you try.不试试看，就不知道自己的潜力

15) Two heads are better than one.三个臭皮匠抵过一个诸葛亮

16) All in the day’s work 习以为常；不足为奇

17) Curiosity killed the cat.好奇心害死猫

18) Great minds think alike.英雄所见略同

19) Wrap things up把事情整理一番，做个结束

20) The feeling is mutual.有同感