单项选择题

There is a misunderstanding that ______.

A．sharks can discover a diver by the movement of his hands in water
B．sharks have very strong sense of smell
C．sharks have poor eyesight
D．sharks are great threats to divers

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热门试题

单项选择题

The best title for the passage is ______.

A．The Mysteries of Animal Communication
B．Something Unknown About Sharks
C．An Adventure
D．How Divers Discover Sharks Under the Sea

单项选择题

The author escaped from the attack of the shark by ______.

A．turning around suddenly
B．screaming
C．swimming back to the shore
D．throwing rubber fins at him