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　

80. in blossom开花(指树木) be in blossom开花(强调状态) come into blossom开花(强调动作)