Questions 11 to 18 are based on the conversation you have just heard.

A．To explain why people fail to act in emergencies.
B．To explain when people will act in emergencies.
C．To explain what people will do in emergencies.
D．To explain how people feel in emergencies.

A．The disadvantages of working in an office.
B．The waste produced in an office.
C．To save resources when working in an office.
D．How to save water in a restroom.