第16题: [单项选择]The United States (has sent) several (spacecrafts) into orbits (around the earth) and has collected a lot of (information). A. has sent B. spacecrafts C. around the earth D. information 参考答案:A 答案解析:改为sent。一般过去时陈述过去发生的事情。
第20题: [单项选择]The Enlightenment thinkers see persons as "citizens of the world". That means ______. 参考答案:C 答案解析:第三段指出,启蒙时期的思想者认为个人不属于任何特殊的团体,他们有权拥有自己的信仰、族群和社会传统。由此推断,答案A、B错误,而C符合原文意思。第三段最后指出,要用原则上对所有人类有效的法律来治理,但并