第21题:[单选题]He spent ages ______ for a pay increase，only to resign from his job soon after he’d received it. A.observing B.occurring C.negotiating D.securing 参考答案:C 选项A意为“观察”；选项B意为“发生”；选项C意为“谈判”；选项D意为“确保”。根据题干，题目意为“他花了很长时间就加薪进行交涉，只是他得到后不久就辞职了。” negotiate for意为“就某事进行交涉，谈判”，选项C符合题意，
A. cutting down cost of sales B. speeding distribution of commodities C. increasing productivity of the companies D. changing the structure of the companies 参考答案:C 答案解析:[解析]事实细节题。本题考的是B-to-B互联网革命的内容，可参考第三段。第三句提到了 saving money and speeding distribution (省钱和降低成本及加速配送)，因此
第35题:[不定项选择题]To deal with this problem, students say they want to___________. A.take a short course on anxiety B.read about anxiety C.be able to manage or understand their anxiety D.take tests to prove they are not anxious 参考答案:A 由第三段可知，学生先参加一个考试焦虑度的测试，如果焦虑度高的话，则会参加短期课程来减缓焦虑，因此答案为A。
第36题: [单项选择]颈内静脉错误的是 A. 是颈部最大的静脉干 B. 与上腔静脉几乎成一线 C. 与颈总动脉距离较远 D. 右侧胸膜低于左侧，故多选右侧颈内静脉穿刺 E. 以甲状软骨上缘为界将颈内静脉分为上、中、下三段 参考答案:C
