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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热门试题

单项选择题

The word odds in Line 1 of Paragraph 1 means ______.

A．happiness
B．preferences
C．chances
D．capability

单项选择题

The author' s purpose in writing this article is to ______.

A．inform readers of Heller' s findings in his researches
B．persuade readers to get enough sleep at different ages
C．show readers the importance of getting enough sleep
D．tell readers how many hours of sleep they should get