第12题: [单项选择]Although the main motivation for a renewed interest in logic was a search for the foundations of mathematics, the chief protagonists of this effort extended their inquiry into the domain of the natural languages. A. explorers B. dedicators C. advocates D. analysts 参考答案:C
A. foods from non-food materials B. foods in plastic tubes C. freeze-dried foods D. eatable food packages 参考答案:A 答案解析:细节题。本文谈到：现在，科学家可能make foods from non-food materials。之后又说缺粮地区的人们可以吃人造蛋白质，从而解决粮食短缺问题，因此，本题选[A]。
第18题: [单项选择]Olympic Games are considered an important means of communication, ___________ people from different countries to gain a better understanding between each other. A. to permit B. permitted C. being permitted D. permitting 参考答案:D
