46. Which of the following is NOT a reason why people kill sharks?
A. People kill sharks for food.
B. People kill sharks for sport.
C. People kill sharks out of fear.
D. People kill sharks because they often attack swimmers.
47. According to the passage, which of the following statements is NOT true?
A. There are many different species of sharks, but only a few of them are dangerous to humans.
B. Sharks never get ill.
C. Sharks are a valuable resource for human.
D. Sharks play an important role in the ocean ecosystem.
48. It can be inferred from the passage that _______.
A. movies have given people the wrong impression of sharks
B. most sharks are dangerous to humans
C. sharks will attack anyone who is wearing black
D. it is dangerous to swim in the ocean
49. The underlined word “prolong” in the last but one paragraph means ______.
A. save B. protect C. lengthen D. improve
50. The best title for the passage would be _______.
A. Are Sharks Dangerous?
B. Sharks And Humans
C. Sharks Humans’ Friends
D. Sharks Help Save Human Lives
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