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 倒數第二.

　　90. but for (=without) 要不是. 表示假設

　　91. buy sth. for…money 用多少錢買

　　92. be capable of 能夠, 有能力 be capable of being +過去分詞是能夠被…的

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

　　94. in case (=for fear that) 萬一;

　　95. in case of (=in the event of)如果發生…萬一 in the case of 至于…, 就…而言

　　96. in no case在任何情況下都不(放句首倒裝句)

　　97. be cautious of 謹防

　　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