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6.she remains confident and ______ untroubled by our present problems. a) indefinitely b) infinitely c) optimistically d) seemingly 7.fiber-optic cables can carry hundreds of telephone conversations ______. a) simultaneously b) spontaneously c) homogeneously d) contemporarily 8.the police were alerted that the escaped criminal might be in the ______. a) vain b) vicinity c) court d) jail 9.whether you live to eat or eat to live, food is a major ______ in every family's budget. a) nutrition b) expenditure c) routine d) provision 10.now a paper in science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on mars. a) configuration b) constitution c) condemnation d) contamination

答案： 6. d 参考译文：她仍然保持信心，看上去不为我们目前的问题所烦恼。 a) indefinitely 不确定地 b) infinitely 无限地 c) optimistically 乐观地 d) seemingly 表面上

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