I burned midnight oil yesterday. So I feel down in the dumps today.

　　· make the dust fly干得很起劲

　　Many volunteers are helping in the Olympic Games. They are making the dust fly without getting pay.

　　· go easy on...酌情处理……；节约使用……；对……手下留情

　　I hope the teacher will go easy on me. Otherwise, I'll have no chance to pass the exam.

　　当介词on的后面跟得是something的时候，此语用来是“节约使用”或“小心对待”

　　Go easy on salt. We have to save some for the next meal.

　　· egg someone on to do something怂恿，鼓动某人干某事

　　Haven't you seen him through? He can help you nothing but egg you on to do illegal things.

　　· rub elbows with someone和某人没有很深的交情

　　I suppose Jack doesn't know me well. We have only rubbed elbows with other for several times.

　　· be at the end of one's tether山穷水尽

　　Mark feels worried because he can't write any new books. He is afraid that he is at the end of his tether.

　　· be at one's wits' end不知如何是好

　　My boy is such a mischief-maker. I am at my wits' end with him.

　　· be at loose ends心里没有着落

　　Many old people feel at loose ends after their retirement.

　　· make both ends meet收支平衡

　　The newly-wed couple found it hard to make both ends meet.

　　· be green with envy羡慕极了

　　Don't be green with envy. He deserves the prize, since he has spent a whole month on that paper.

　　· be of the essence绝对不可少，关键的

　　As for study, diligence is of the essence.

　　· a poor apology for...蹩脚货，名不副实

　　That travel agency was first-class, but it offered a poor apology for its service

　　· make an exhibition of oneself出洋相

　　如果表示总出洋相可以在exhibition一词前加上形容词， regular

　　She is a bit insane. She always makes a regular exhibition of herself by raging at almost everybody.

　　· keep an eye open密切注视

　　Keep an eye open for anyone who arouses your suspicion.

　　· see eye to eye with...与……意见一致

　　Though they are twins, they never see eye to eye with each other on anything.

　　· turn a blind eye on装做没看见

　　It is not right for teachers to turn a blind eye to those who cheat in the exam.

　　· feast one's eyes on...观赏……，一饱眼福

　　Yesterday we went to a fashion show. We really feasted our eyes on beauties and fancy clothes.

　　· have a face would stop a clock奇丑无比

　　The old lady has a face that would stop a clock, but she is the helpful person I have ever met.

　　· keep a straight face板着脸

　　He likes telling jokes . But always keeps a straight face when others are shaking their sides with laughter.

　　· be fed up with...对……烦透了

　　My roommates are too noisy. I'm really fed up with them.

　　· fall for...迷恋上……

　　She fell for that guy simply because he behaved quite differently from others.

　　· be riding for a fall自讨苦吃

　　That big country is riding for a fall if it keeps interfering with others'' internal affairs.

　　· play fast and loose with...敷衍了事，不正经干

　　You are not clever enough to play fast and loose with Susan.

　　· play favorites with...对……有偏心眼

　　The girl isn't on good terms with her parents. They play favorites with her little brother.

　　· put out a feeler to do...试探……的反应

　　The chairman put out a feeler to see people's reactions to his election speech.

　　· be dead on one's feet筋疲力尽

　　Our boss regards us his slaves. Everyday after work.

　　· land on one's feet安全摆脱困境

　　With the loan from the bank, the company landed on its feet.

　　· stand on one's feet自食其力

　　The Chinese Communist Party decided to stand on their feet during the Liberation Campaign. People in Naniwan were called upon to develop agriculture.

　　· sit on the fence保持中立

　　Who would you vote for? You bet I won't vote for him. He likes sitting on the fence on important issues.

　　· play the field不正经干

　　He is really a playboy, He likes to play the field and is never serious with any one girl.

　　· burn one's fingers因管闲事而吃苦头

　　I always tell you to keep away from the scoundrels. Now you are burning your fingers.

　　· have sticky fingers手不老实。有小偷小摸的陋习

　　The old lady fired the maid because she had sticky fingers.