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. There must be something wrong（一定出了毛病）with its operating system.

　　89. Leaving one’s job, no matter what kind (of job 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/where I grew up, (与我成长的地方相比)this town is more prosperous and exciting.

　　91. Not until he had finished the mission(直到他完成使命)did he realize that he was seriously ill.