A．They were very cheap materials.
B．They could be found here and there.
C．They could add artistic value to buildings.
D．They were not easily burned and can last long.
A．Materials of Architecture
B．Architecture and Literature
C．Development of Architecture
D．Classification of Architecture
A．The increase in car owners.
B．The increase in car stealing.
C．The increase in driving offences.
D．The increase in professional gangs.