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

A．They found Charles looking very worried.
B．They set about gathering wood for a fire.
C．They got large handful of sticks.
D．They found a fire.

A．They were sold to people before necessary facilities were installed.
B．They were usually not large enough to accommodate big families.
C．They were mostly inhabited by people who did .not earn much.
D．They provided playgrounds for children on the top of the buildings.