单项选择题

A．It tries to categorize the different kinds of sharks throughout the world.
B．It tries to warn humans of the dangers posed by sharks.
C．It tries to describe the characteristics of shark teeth.
D．It tries to clear up misconceptions about sharks.
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单项选择题
A．sick friend.B．A math class.C．School policy.D．The man’s test.
A．sick friend.
B．A math class.
C．School policy.
D．The man’s test.
单项选择题
A．The man’s last appointment.B．Professor Irwin’s office hours.C．Student advisement during registration.D．The man’s health problems.
A．The man’s last appointment.
B．Professor Irwin’s office hours.
C．Student advisement during registration.
D．The man’s health problems.
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