43. According to the passage, it will be difficult to predict weather  _____________
(A) without more powerful computers.
(B) because we don’t communicate globally.
(C) unless we learn more about chaotic systems.
(D) until we understand the physical laws of atoms.

39. (A) but first since she recovered from a potentially career-ending shoulder injury (B) transformed her into one of the favorites for the Paris title (C) led many to ponder whether she had been overtaken by a new generation of big-hitters (D) which launched her on the road to international fame and fortune

40. (A) but first since she recovered from a potentially career-ending shoulder injury (B) transformed her into one of the favorites for the Paris title (C) led many to ponder whether she had been overtaken by a new generation of big-hitters (D) which launched her on the road to international fame and fortune

41. (A) but first since she recovered from a potentially career-ending shoulder injury (B) transformed her into one of the favorites for the Paris title (C) led many to ponder whether she had been overtaken by a new generation of big-hitters (D) which launched her on the road to international fame and fortune

42. (A) but first since she recovered from a potentially career-ending shoulder injury (B) transformed her into one of the favorites for the Paris title (C) led many to ponder whether she had been overtaken by a new generation of big-hitters (D) which launched her on the road to international fame and fortune

44. Why do the predictions disagree for the computer model? (A) The conditions at the beginning were very different. (B) The model was not accurately programmed. (C) Computer models cannot predict weather. (D) Over time models are less reliable.

45. Which of the following best explains the term “butterfly effect”? (A) Slight variations in initial conditions can cause very different results. (B) A butterfly’s wings can be used to predict different conditions in various locations. (C) The weather is as difficult to predict as the rate of a butterfly’s wings when it flaps them. (D) A butterfly flaps its wings in one location, which automatically produces a result in another place.

46. The author suggests that our knowledge of chaotic systems _____________(A) will never allow us to make accurate predictions. (B) requires more research by the scientific community. (C) reveals detail that can be predicted quite accurately. (D) has not improved very much over the years.

47. Which of the following statements about Cohen’s research is INCORRECT? (A) The research is based on data collected from three substantial studies. (B) The research included more than 200,000 healthcare workers. (C) None of the subjects were found having hypertension at the end of the research. (D) The period of research ranged from 16 to 38 years.

48. What can be inferred from the passage? (A) Michael Bloomberg encouraged the use of all ingredients in diet and soft drinks. (B) New York has recently launched a series of measures to restrict the dose of sugar in soda drinks. (C) New York’s public authorities favored sea salt and organic sugar. (D) Fruit sugar is undoubtedly the main reason for increasing the risk of high blood pressure.

49. According to the article, which might be a causative factor for high blood pressure? (A) Sugar-sweetened beverages. (B) Artificially sweetened beverages. (C) Carbonated drinks. (D) All of the above.