30. According to the information in paragraph 5, what is the most essential measure of a success by most explorers?
(A) wealth
(B) survival
(C) fame d. knowledge 

26. What is true about the Andrée expedition? (A) The expedition successfully reached the North Pole but failed to return. (B) No one ever learned what happened to the members of the expedition. (C) The crew tried to communicate with others by means of carrier pigeons. d. It was not learned what had happened to the crew until many years later.

27. What is the main idea of paragraph 3? (A) People today are less accepting of failure than they used to be. (B) Schools today now teach students how to avoid failure. (C) The author considers failure an essential component of success. d. Psychologists have long been aware of failure's significance.

28. What does the author imply about mountain climber Pete Athans in paragraph 4? (A) He was able to reach the peak of Mt. Everest on his fifth attempt. (B) He did not have enough climbers with him on his early attempts. (C) He took a more difficult route each time he tried to climb Mt. Everest. d. He had several failures even after his first successful climb of Mt. Everest.

29. What did Ernest Shackleton inspire Professor Nancy Koen to do? (A) go on an exploratory mission herself (B) author a best-selling book (C) educate students with an account of his journey d. found a high-tech business

31. The new study described in this article suggests which sequence of events for the building of Stonehenge? (A) The bluestones were arranged in the horseshoe configuration and then accented with the larger stones. (B) Ancient peoples first arranged the small bluestone configuration and later ringed it with large, imported granite slabs. (C) The sandstone horseshoe was developed first, thousands of years ago, and the smaller bluestones were imported later from Wales. d. All the stones were brought in at the same time and slowly arranged over centuries.

32. Which type of methodology does the new study rely on to discern Stonehenge's timeline? (A) Mineralogy (B) Statistical analysis (C) Carbon dating d. DNA analysis

33. According to the article, a sarsen could weigh how much? (A) 38 tons (B) 48 tons (C) 58 tons d. 68 tons

34. Until the study that is discussed in the article, what was the accepted sequence of Stonehenge's construction? (A) Bluestone horseshoe, then sandstone oval (B) Bluestone diamond, then sandstone square (C) Bluestone square, then sandstone circle d. Bluestone oval, then sandstone horseshoe

35. None of the following were known artifacts in constructing the new Stonehenge timeline EXCEPT (A) Arrowheads of the nearby civilizations (B) Skeletons of ancient peoples (C) An antler bone wedged between stones d. Stone eroded clearly enough to be dated

36. It is agreed between old and new studies that Stonehenge was first used by civilizations? (A) 5,000 years ago (B) 6,000 years ago (C) 7,000 years ago d. 8,000 years ago