翻译
87. Medicalresearchersarepainfullyawarethattherearemanyproblems ______________ (他们至今还没有答案)
点评：本題要翻译成英语的定语从句，修饰前面的problems，时态最好用现在完成时，故可翻译成：(which / that ) theyhavenotcomeupwith / foundasolutionto.
88. __________（大多数父母所关心的）isprovidingthebesteducationpossiblefortheirchildren.
点评：本句的汉语部分要翻译成英语中的主语从句，宜用what引导，可翻译成Whatconcernsmostparents 或者Whatmostparentsareconcernedabout。
89. Youbbettertakeasweaterwithyou ________(以防天气冷).
点评：本题重点考察以防，可以翻译成incase引起的从句，从句中的谓语动词多用should+动词原形，但可以不用虚拟语气，而用动词的陈述语气。所以，本题可翻译成incaseitturns / becomescold.或者incaseitshouldturn / becomecold.
90. Throughtheproject, manypeoplehavereceivedtrainingand _______(决定自己创业).
点评：本题重点考察创业，可翻译成tolaunch / setup / establish / begintheirownenterprise. 或者tolaunch / setup / establish / beginanenterpriseoftheirown.
91. Theanti-virusagentwasnotknown _________ (直到一名医生偶然发现了它)