81. boast of (or about)吹嘘

　　82. out of breath喘不过气来

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

　　84. in bulk成批地，不散装的

　　85. take the floor起立发言

　　86. on business出差办事。

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

　　88. last but one倒数第二。

　　89. but for (=without)要不是.表示假设

　　90. buy sth. for...money用多少钱买

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

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

　　93. in case (=for fear that)万一;

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

　　95. in no case在任何情况下都不(放句首倒装句)

　　96. be cautious of谨防

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

　　98. be certain of (=be sure of)有把握， 一定。

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

　　100. by chance(=accidentally, by accident)偶然