87-81答案：
87. Our efforts will pay off if the results of the research can be applied to the exploration of new technology.（能应用于新技术的开发）
88. I can’t boot my computer now. Something must be wrong （一定出了毛病）with its operating system.
89. Leaving one’s job, no matter what/whatever it is, （无论是什么工作）is a difficult change, even for those who look forward to retiring.
90. Compared with the place in which I grow up, （与我成长的地方相比）this town is more prosperous and exciting.
91. Not until he finished his task/mission （直到他完成使命）did he realize that he was seriously ill

36-43答案：
36. labor
37. ingredients
38. vital
39. individuals
40. engage
41. figures
42. generating
43. currently

作文：
Recreational Activities
1、 娱乐活动多种多样
2、 娱乐活动可以使人们受益，也可能带来危害
3、 作为大学生，我认为……