81. on board 到船上， 在船上， 上火車或飛機
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)