Questions 17 to 20 are based on a telephone conversation between Ms Muller and a hotel receptionist. You now have 20 seconds to read Questions 17 to 20.

For how long does Vera reserve Ire conference room

A．exclusively due to the effect of the inertia of the earth’s climate
B．partly due to variations in the output of solar energy
C．possibly because the levels of carbon dioxide are rising
D．possibly because the ice caps in the poles are melting

A．emerges in the wake of the anti-happy art
B．is a cause of disappointment for the general public
C．replaces tile church as a major source of information
D．creates an illusion of happiness rather than happiness itself