1.above all - most importantly
　　2.account for - explain
　　3.as a matter of fact - in fact ,to speak the truth
　　4.as a rule - generally ;normally
　　5.about to - be ready to;be on the point of doing something
　　6.an old hand - be an experienced person
　　7.any day now -soon
　　8.approach sb -talk to sb
　　9.be fed up with - be out of patience with
　　10.be on one’s own - live independently
　　11.be on the safe side - take no chances
　　12.be out of something - have no longer in supply
　　13.be tired of - be bored with ,frustrated with
　　14.be up to ones’ears - be extremely busy
　　15.be up to someone -be a person’s responsibility
　　16.be out for -trying to get
　　17.be out of the question - be unacceptable ,impossible
　　18.bite off more than one can chew - take on more than one can handle
　　19.break down - cease to function