Passage Three

A．Introduce the woman to his friends.
B．Get familiar with the university campus.
C．Go to the tennis courts for an appointment.
D．Take part in a tennis contest at a sports meeting.

A．By observing the ordinary ones that have already erupted.
B．By studying the larger part of a volcano hidden underground.
C．By tapping their potential of imagination.
D．By resorting to past information and modem technology.