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

24. (A) so (B) yet (C) thus (D) similarly (E) nevertheless

25. (A) invade (B) envision (C) inquire (D) enforce (E) interrupt

26. They were ideal eco-tourists because __________________. (A) these visitors worked side by side with the local people (B) these visitors did not litter (C) these visitors changed the environment (D) these visitors cared for the natural state of the places they had visited (E) these visitors brought money along

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.

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.

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

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