单项选择题

The snakehead is very perilous because it ______.

A．has rows of sharp teeth
B．can dart out of hiding holes to chase, and catch
C．may devour every other fish in the lake or pond
D．is regarded as top predator

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热门试题

单项选择题

How many states in the U.S.A have been threatened by snakeheads

A．Three
B．Five
C．Four
D．Six

单项选择题

According to Mr. Gilmore the spread of snakehead is ______.

A．based on legal means
B．by illegal means
C．in an Asian fish store's favor
D．out of economic consideration