Questions 19 to 21 are based on the conversation you have just heard.

A．Those dream interpretations are based on psychological thesis.
B．We can find nothing reliable in those interpretations.
C．Some dream interpretations have scientific support.
D．Most of the interpretations of dreams are not very believable.

A．England’s proximity’ to the sea.
B．Volcanic ash in the atmosphere.
C．Flooding in the area.
D．Pollution caused by the International Revolution.