Questions 19 to 22 are based on the conversation you have just heard.

A．He spent almost all his money.
B．He didn’t live with his brother.
C．He didn’t have any scholarship.
D．He saved a large sum of money.

A．The passage tells us the habitat and migration of sharks.
B．The passage tells us why sharks are dangerous to people.
C．The passage introduces the evolutional process of sharks.
D．The passage introduces the basic information about sharks.