单项选择题

The passage mainly discusses ______.

A．the number of people being attacked by sharks
B．the benefits of sharks to improving human health
C．the dangers sharks have brought to human beings
D．the relationship between sharks and human beings

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单项选择题

It can be inferred from the passage that ______.

A．most sharks are dangerous to human beings
B．sharks only attack someone in black wet suits
C．movies and popular novels are always misleading
D．sharks are a valuable resource for human beings

单项选择题

By the second sentence of Paragraph 2, the author means to show that ______.

A．pigs attack human beings more frequently than sharks
B．people get hurt much more easily in a car accident
C．people get killed more easily by pigs or car accident than by sharks
D．sharks rarely kill human beings when they are not provoked to do so