Passage Three Questions 32 to 35 are based on the passage you have just heard.

A．Most sharks are about the same size as human beings.
B．Sharks are the largest fish, most of them are bigger than buses.
C．Most sharks are much longer than human beings.
D．Sharks are big animals, most of them are about 50 feet long.

A．The active volcanoes in the Antarctic.
B．The icebergs and volcanoes around the world.
C．How to prevent the eruption of volcanoes.
D．Volcano can protect ice sheet from melting.