1 . Inca builders cut stones to exact sizes so that nothing was needed to hold walls together other than the perfect fit of the stones. (用英语解释教材原句)
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2 . 不管付出多大的代价,他都要圆满完成这项任务。(cost)(汉译英)
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3 . After two years in Spain, Kate spoke the language ____ (perfect). (所给词的适当形式填空)
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