42.account for——explain

　　43.out of print——no longer available for purchase from the publisher

　　44.send out——distribute

　　45.in no time——in a very brief time；almost at once

　　46.before long——soon；without much delay

　　47.play by ear——（1）play an instrument without using written music

　　（2）handle a matter without adequate preparation or guidance

　　48.wear and tear——loss or damage caused by use

　　49.come what may——no matter what happens

　　50.drop by——make a short or unplanned visit

　　51.be short of——not having enough

　　52.cut it out——stop doing sth

　　53.be sick of——be tired of；having a strong dislike of

　　54.look for a needle in a haystack（a bottle）——search for something in a place where it is hopelessly lost.

　　55.knock oneself out——work very hard；make a great effort

　　56.run up against——encounter

　　57.far from——anything but；not at all

　　58.far from it——by no means；not at all

　　59.hang on to——hold tightly；keep firmly

　　60.get nowhere——be unsuccessful；obtain no result

　　61.day in and day out——every day；all the time

　　62.break down——cease to function

　　63.get going——get started；begin to move

　　64.take one's time——not hurry

　　65.boil down to——indicate，especially as a final judgement or analysis

　　66.make up——take a test for the second time

　　67.put up with——bear with patience；tolerate

　　68.by and by——before long

　　69.give someone a hand——help；assist

　　70.ring a bell——sound familiar

　　71.snap out of it——（1）change one's habits，attitude，etc，suddenly

　　（2）regain one's composure，energy，or good spirits；recover

　　72.raise the roof——make trouble；start a fight or an argument

　　73.get away with——escape without punishment

　　74.on business——with definite work to do

　　75.look up——search for；as an item of information，in a referance book

　　76.let up——（1）cease；stop

　　（2）slacken；abate

　　77.in any case（or event）——no matter what happens

　　78.come out——be published

　　79.look into——investigate；inspect

　　80.fall back on——rely on