31. John von Neumann invented __________________.
(A) a chess game
(B) a poker game
(C) a logic theory
(D) a market theory
(E) a games theory

27. Which of the following statements defines “eroding” in the above excerpt? (A) The rain was running down along the soil. (B) The rain was falling onto the soil. (C) The rain was washing away the soil. (D) The rain was severely destroying the soil. (E) The rain was making the soil get rotten.

28. The main idea of this excerpt could be __________________. (A) The eco-tourists looked for ways to conserve the environment (B) The first eco-tours were to Africa and Latin America (C) The eco-tourists got their hands dirty in order to get closer to nature (D) The eco-tourists brought about prosperity (E) All of the above

29. What does “rugged” mean? (A) primitive (B) budget limited (C) organized and packaged (D) strong (E) original

30. Which sentence below would be a good conclusion? (A) A nature tour is a good way to learn about a different culture. (B) As long as the travel is friendly to the environment, it can promote peace and understanding in the world. (C) Eco-tourists have lots of different choices for their trips. (D) The choice of one trip may contradict other choices of trips. (E) A trip may be harmful to the environment.

32. A move in chess could be predicted by __________________. (A) concealment (B) bluff (C) luck (D) application of logic (E) cheat

33. A game involved no concealment is a game of __________________. (A) perfect information (B) imperfect information (C) sheer chance (D) honest (E) cheat

34. To “delude” probably means to __________________. (A) enjoy (B) believe (C) deceive (D) depend on (E) illusion

35. What can be inferred in the last paragraph? (A) Most businessmen believe they are honest players in games. (B) Most businessmen are also interested in gambling. (C) Most businessmen like to cheat in the games. (D) Most businessmen might underestimate the risks they play. (E) Most businessmen might overestimate the risks they play.

36. What can be inferred from the passage? (A) The author regards solar energy as an inexhaustible energy. (B) Solar energy is an efficient alternative. (C) The author is less optimistic than the environmentalists with regard to the use of solar energy. (D) Many environmentalists protest against the problematic use of solar energy. (E) It is totally impossible to use solar energy.

37. The word “proponents” in the first line means __________________. (A) protesters (B) competitors (C) technicians (D) realists (E) supporters