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
　　both ---- > eithe
　　briefing ---- > be informed
　　bring ---- > tell
　　bring sb. (back) sth. ---- > get sb. sth.
　　budget ---- > price
　　bump into sb. ---- > see sb.
　　burn up ---- > furious // angry
　　by leaps and bounds ---- > quickly
　　by mail // through the mail ---- > in writing // write to
　　by the time ---- > overdue
　　by tomorrow ---- > quick