be out of something - have no longer in supply
be tired of - be bored with ，frustrated with
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 onecanhandle
break down - cease to n
break the ice - begin to be friendly wuth people onedoesn’tknow
break the news - inform or give bad news
brush up on - imporve noe’s knowledge of somethingthroughstudy
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