81.on board 到船上，在船上，上火車或飛機(jī)
82.boast of (or about) 吹噓
83.out of breath 喘不過氣來
84.in brief (=in as few words as possible) 簡言之
85.in bulk成批地，不散裝的
86.take the floor 起立發(fā)言
87.on business 出差辦事
88.be busy with sth. 于某事
be busy doing sth. 忙于做某事
89.last but one 倒數(shù)第二
90.but for (=without) 要不是。表示假設(shè)