back ----> return

　　back up ----> tie up

　　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 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 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 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　　be out of date ----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 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

　　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

　　better ----> improvement // so good // happy

　　better off ----> well off

　　blow above the shore line hills ----> come from over the hills

　　boil down to ----> wind up

　　boring // have an/one eye on clock ----> uninteresting

　　borrow ----> lend // loan // use

　　both ----> either

　　briefing ----> be informed

　　bring ----> tell

　　bring sb. (back) sth. ----> get sb. sth.

　　budget ----> price

　　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

　　by all means ----> definitely

　　by leaps and bounds ----> quickly

　　by mail // through the mail ----> in writing // write to

　　by the time ----> overdue

　　by tomorrow ----> quick

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