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.

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.

50. What is the best title for the article? (A) The Role of Fruit Sugar in High Blood Pressure (B) The Effect of Fruit Sugar (C) The Appropriate Diet and Health (D) Different Types of Sugar

1. It was pure _____ for him to meet by accident a good friend in Disneyland. (A) ambiguity (B) serendipity (C) graffiti (D) prodigy

2. Teenagers are known to get _____ with anything they consider boring or routine. (A) sentimental (B) paranormal (C) engaging (D) disenchanted

3. The spruce bud worm that attacks pine trees is _____ in that area. (A) sarcastic (B) deliberate (C) episodic (D) endemic

4. Marmots spend their time foraging among meadow plants and flowers or _______ on rocky cliffs. (A) gets sun (B) sunning (C) the sun (D) sunny

5. February normally has twenty-eight days, but every fourth year, ______ has twenty-nine. (A) there (B) its (C) is a leap year (D) a leap year, it