rain cats and dogs______字面意思是下猫下狗，其实在英语里面是倾盆大雨的意思
two two two（别看第二个也是two，其实应该想成to，考试里有，意思是2点差2分钟）
a bad apple, 金玉其外，败絮其中
a gay dog, 欢喜坨（我们那的方言）
a hard nut, 硬骨头
a hen-pecked husband, 妻管严
fat cat, 朱门大户
bosom friends, 心腹之交
con artist,，
fat chance, 绝佳机会
a storm in a teacup, 大惊小怪
the last straw, 救命稻草
under age,
rat race, 你死我活的竞争
keep somebody at arm’s length, 形影不离
be on one’s back, 卧病在床
make somebody’s blood boil, 热血沸腾
sad dog, 苦瓜脸
work addict, 工作狂
give it to somebody straight,
have head like a sieve, 健忘者
in one’s heart of hearts, 在内心深处
cool one’s heels, 空等
have a big nose,
have a sweet tooth, 爱吃甜食
twist one’s arm,
rude awakening, 幻灭
Die in one’s boots, 暴卒
Keep one’s shirt on, 忍辱负重
I am so flattered.
it slipped my mind. 使我一时想不起
butterflies in my stomach, 战抖
It gives me the creeps.
Shout something from the rooftops , 登高而呼
Burn a hole in one’s pocket.,
Be all ears, 洗耳恭听
Foot the bill, 负担费用
Let one’s hair down；
Pull one’s leg, 拖后腿
A bread-and-butter letter,
Straight A 高材生,
Dry run, 排练
Penny pincher, 铁公鸡
Old money ,
a pain in the neck, 讨厌鬼
keep one’s finger crossed, 乞求好运
in hot water,
out of the blue, 猝不及防
at sixes and sevens， 乱七八糟
参考资料：http://wenwen.soso.com/z/q196592787.htm