81. on board到船上，在船上，上火车或飞机

82. boast of（or about）吹嘘

83. out of breath喘不过气来

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

85. in bulk成批地，不散装的

86. take the floor起立发言

87. on business出差办事

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

89. last but one倒数第二

90. but for（=without）要不是表示假设

91. buy sth. for…money用多少钱买

92. be capable of能够，有能力be capable of being +过去分词：是能够被…的

93. in any case（=for love or money，at any rate，at any price，at any cost，whatever happens；anyhow）无论如何

94. in case（=for fear that）万一；

95. in case of（=in the event of）如果发生…万一in the case of至于…，就…而言

96. in no case在任何情况下都不（放句首倒装句）

97. be cautious of谨防

98. center one's attention on（=focus one's attention on）把某人的注意力集中在…上

99. be certain of（=be sure of）有把握，一定

100. for certain of（=for sure）肯定地，有把握地