back return
　　back up tie up
　　backpack knapsack
　　band try out want to play in the band
　　bargain purchase
　　be a little rusty not do sth. very much
　　be a while wait
　　be about to // busy no time
　　be about to lift the pan will soon be allowed
　　be astonished be surprised
　　be at attend
　　be booked up reserve
　　be bored have nothing better to do
　　be certainly/definitely news be surprised
　　be crowded be well-attended
　　be done complete
　　be done with // be through with be finished with
　　be due Friday be paid by the end of the week
　　be excited // can hardly wait look forward to (doing) sth.
　　be exhausted stay at home and rest
　　be fed eat
　　be free not busy
　　be in one ear and out the other doesn't listen
　　be increasing controlled by banks be more dependent on loans from banks
　　be ineligible/unfit/unsuitable for can't enter
　　be interested in // can't put it down enjoy
　　be just a little short of need to find a few more
　　be left behind get lost
　　be longer than it needs to be not need to be so long
　　be made of/from composition
　　be not good with dates have trouble remembering when things happen
　　be off // restriction eliminate
　　be off in a minute end sth. quickly
　　be on a diet go on a diet
　　be on duty at the library go to work
　　be on time // set one's watch be punctual
　　be only human sb. expects too much from oneself.
　　be onto something promising
　　be out of off
　　be out of date no longer be correct
　　be out of earshot be too far away
　　be out of one's mind be a foolish idea // make a bad decision
　　be out of shape/steam // crawl be/get/dog tired // tired/worn out // run down
　　be over change
　　be over at one // after that in the afternoon
　　be overwhelmed with be busy with
　　be pretty happy with seem to like
　　be pretty rusty lose some of one's skill
　　be really dedicated do one's best
　　be really onto sth. Sth. seems promising.
　　be really pretty crowded // stand in the aisles be very well attended
　　be short of one course need to take another course
　　be sold out not ... any more
　　be still on for next week continue the following week
　　be still working keep one's job
　　be supposed to be easy // not ... do well in // isn't easy difficult
　　be tested on it read the page carefully
　　be the obvious choice would get the job
　　be through in next no time be nearly finished
　　be through it in two days be a fast reader
　　be tied up in // have one's hands full // have a tight schedule too busy
　　be up to // over one's head not succeed
　　be up to sb. // count on sb. sb. can decide // sb. may make the decisions
　　be useful help
　　be/feel under the weather be/feel (a little) ill/sick
　　be/get used to (doing) sth. be/get accustomed to sth.
　　be/run low on sth. buy sth.
　　be/stay up (doing) make a night of it
　　beach seashore
　　beach seashore
　　before earlier than
　　before law and order were established // cheating and robbing each other lawless
　　before long // right away // by and by // on short notice immediately // quickly // shortly // soon
　　before we start our first lab at the beginning of the semester
　　begin one's study an introductory class
　　believe ...? surprise
　　best delicious // most appropriate
　　best score perfect grade
　　better improvement // so good // happy
　　better off well off
　　beyond sb. not understand
　　big sale discount
　　blow above the shore line hills come from over the hills
　　boil down to wind up
　　book reserve
　　boring // have an/one eye on clock uninteresting
　　boring uninteresting
　　borrow lend
　　borrow lend // loan // use
　　both either
　　breathe air pollution
　　briefing be informed
　　brighten one's spirits make one feel better
　　bring tell
　　bring sb. (back) sth. get sb. sth.
　　broke no money
　　budget money // price
　　budget price
　　bump into meet // see
　　bump into sb. see sb.
　　burn up furious // angry
　　burst overeat
　　business meeting // flight // late last night // keep up with that kind of pace have a busy schedule
　　buy purchase
　　buy purchased
　　by all means definitely
　　by and by in a short while
　　by leaps and bounds quickly
　　by leaps and bounds quickly
　　by mail // through the mail in writing // write to
　　by the time overdue
　　by tomorrow quick