Passage Three Questions 32 to 35 are based on the passage you have just heard.

A．That drugs should not be used without doctors’ advice.
B．That drugs and substances are different.
C．That substances should be used in a scientific way.
D．That the misuse of substances is harmful.

A．Most people don’t think it is a serious problem.
B．Most of our pollution is caused by things people need.
C．The government has not spent enough money to stop it.
D．The seriousness of pollution has not been realized by the government.