above all - most importantly
　　account for - explain
　　as a matter of fact - in fact ,to speak the truth
　　as a rule - generally ;normally
　　about to - be ready to;be on the point of doing something
　　an old hand - be an experienced persom
　　any day now -soon
　　approach sb -talk to sb

be up to ones'ears - be extremely busy
　　be up to someone -be a person's responsibility
　　be out for -trying to get
　　be out of the question - be unacceptable ,impossible
　　bite off more than one can chew - take on more than one can handle
　　break down - cease to function
　　break the ice - begin to be friendly wuth people one doesn't know
　　break the news - inform or give bad news
　　brush up on - imporve noe's knowledge of something through study
　　bump into - meet unexpectedly
　　by and large - in general
　　by heart - by memory
　　by all means - absolutely ,definitely
　　by no means - in no way
　　call off -cancel
　　cheer up - be happy
　　come down with - become sick with
　　come into -receive,especially after another's death
　　come up with - think of
　　count on - depend upon
　　count out - eliminate
　　die down - become quiet ,become less
　　do without - manage without something
　　drop by - visit informally; pay a short visit
　　every other - alternate
　　fall behind - lag; fail to accomplish something on time
　　fall through - fail to happen or be completed