Passage Two
Questions 29 to 31 are bused on the passage you have just heard.

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.

A) About taking up a sport. C) About favorite tennis teams.
B) About obtaining a pair of shoes. D) About joining a sports club.