Questions 11 to 18 are based on the conversation you have just heard.

A．She was driving along a county road.
B．She was lying near a lonely road, trembling.
C．She was lying in a hospital bed.
D．She was telling an astonishing story to a doctor.

A．Because both have a limited supply of air, water, and other resources.
B．Because the Earth moves around the sun as fast as a spaceship.
C．Because we can travel to outer space.
D．Because the Earth never stops moving.