90. but for (=without) 要不是. 表示假设　­

89. last but one 倒数第二.　­

88. be busy with sth.于某事 。 be busy doing sth. 忙于做某事　­

87. on business 出差办事.　­

86. take the floor 起立发言　­

85. in bulk 成批地,不散装的　­

84. in brief(=in as few words as possible)简言之　­

83. out of breath 喘不过气来　­

82. boast of (or about) 吹嘘　­

81. on board 到船上, 在船上, 上火车或飞机　­