06.6
    87 Having spent some time in the city, he had no troublefinding the way to the history museum(到去历史博物馆的路).
    88 In order to support my university studies (to finance my educationto pay for my education/to pay my tuition fees(为了挣钱供我上学), Mother often takes on more work than is good for her.
    89 The professor required that we(should) hand in our/the research report(s)
(我们交研究报告)
    90 The more you explain, the more confused I am(我愈糊涂).
    91 Though a skilled worker, he was fired by the company(他被公司解雇了) last week because of the economic crisis.
 
06.12
    87. Specialists in intercultural studies say that it is not easy toadapt oneself to life/living in different cultures(适应不同文化中的生活)
    88. Since my childhood I have found thatnothing is more attractive to me than readingto me, nothing is more important than reading(没有什么比读书对我更有吸引力)
    89. The victimwould have had a chance to survivewould have survived(本来有机会活下来) if he had been taken to hospital in time.
    90.Some psychologists claim that people might feel lonely when they are far from home/ are not in their hometown/ traveling.(出门在外时可能会感到孤独)
    91The nations population continues to riseat a speed/rate of 12 million per year at an annual speed of 12 million(以每年1200万人的速度)
07.6
    87. The finding of this study failed to take peoples sleep quality/quality of sleep into account/consideration(将人们的睡眠质量考虑在内).
    88.The prevention and treatment of AIDS is  a field in which we can work together / a field in which we can cooperate(我们可以合作的领域) .
    89. Because of the leg injury, the athletedecided to quit the matchadaptto(决定退出比赛).
    90.To make donations or for more information, please  contact us at the following address(按以下地址和我们联系).
    91.Please come here at ten tomorrow morning  at your convenience/if it is convenient for you(如果你方便的话).
07.12
    87  Thanks to/ because of a series of new inventions(多亏了一系列的新发明), doctors can treat this disease successfully.
    88 In my sixties, one change I notice is that I have been more likely to get tired than before/ I get tired more easily than before(我比以前更容易累了).
    89 I am going to pursue this course, no matter at what expense (cost)/ no matter what I have to sacrifice (pay)/ would have to sacrifice (pay)(无论我要作出什么样的牺牲).
    90 I would prefer shopping online to shopping in a department store because  the former/ shopping online is more convenient and efficient (time-saving) (can save more time)(它更方便和省时).
    91 Many Americans live on credit, and their quality of life is measured in terms of how much they can borrow(用他们能够借到多少来衡量的), not how much they can earn.
08.6
    87 Our efforts will pay off if the results of this researchcan be applied to the development of the new technology.(能应用于新技术的开发)
    88 I cant boot my computer now. Something must be wrong(一定出了毛病) with its operation system.
    89. Leaving ones job,  whatever job it is/ no matter what job it is(不管是什么工作), is a difficult change even for those who look forward to retiring.
    90. Compared with the place 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.
08.12
87. Medical researchers are painfully aware that there are many problems which/that they haven’t found answers to (他们至今还没有答案).
88. What most parents care about / are concerned aboutThe concern of most parents (大多数父母所关心的)is providing the best education possible for their children
89. You’d better take a sweater with you in case it turns/should turn coldlest it should turn cold (以防天气变冷).
90. Through the project, many people have received training and decided to start their own business (决定自己创业)
91. The anti-virus agent was not known until it was accidentally found/discovered by a doctor (直到一名医生偶然发现了它).
09.6
87. Soon after he transferred to the new school, Ali found that he had difficulty (in) catching up with his classmates(很难跟上班里的同学)in math and English
88. If she had returned an hour earlier, Mary would not have been caught in the heavy rain(就不会被大雨淋了).
89. It is said that those who are stressed or working overtime are more likely to gain /put on weight(更有可能增加体重). 
90.What is not realized by many people/ what many people have not realized(很多人所没意识到的)is that Simon is a lover of sports, and football in particular.