Passage Two
Questions 29 to 32 are based on the passage you have just heard.

A. They paid much attention to the results of scientific discoveries.
B. They seldom introduced safety laws before disasters occurred.
C. They hardly ever looked into the causes of tragedies.
D. They imposed safety rules as soon as disasters occurred.

A. Go to summer school.
B. Take a vacation.
C. Stay at home.
D. Earn some money.