3. This short passage is probably taken from _______.
A. a news report
B. a guide to the world
C. an article by a medical worker
D. a government report
答案: A 指导：据写作方式和最后一段所列举的“人”可知文章是以“呼吁”的语气写的，故A为最佳答案。
4. Which of the following is NOT mentioned in the last paragraph as people responsible for the present state of the
world?
A. Officials. B. Industrialists.
C. Businessmen. D. Scientists.
答案: C 指导：由最后一段最后一句可知。
