be onto something ----promising

　　be overwhelmed with ----be busy with

　　beach ----seashore

　　best score ----perfect grade

　　beyond sb. ----not understand

　　big sale ----discount

　　book ----reserve

　　boring ----uninteresting

　　borrow ----lend

　　breathe ----air pollution

　　brighten one’s spirits ----make one feel better

　　broke ----no money

　　budget ----money // price

　　bump into ----meet // see

　　buy ----purchased

　　by and by ----in a short while

　　by leaps and bounds ----quickly

　　cake // apple pie ----dessert

　　can hardly wait to do ----look forward to doing // can’t wait to do // be anxious to do

　　can’t fit it in ----too busy

　　can’t get away with that ----will get into trouble

　　can’t put the book down ----the book is interesting

　　can’t recognize ----looks different

　　can’t stick around ----have to go

　　can’t turn down an offer ----be eager to go

　　carry out the plan ----implement the plan

　　casual ----informally

　　change ----money

　　change of pace ----diversion

　　charge ----pay // fine

　　check ----ask

　　check it out ----find out

　　cheerful ----happy

　　chop down ----cut down