Civil works can be classified into？
A. silos
B. railroads
C. mass transit system
D. harbours and ports
E. tunnels
F. buildings
When a project begins, who are engaged in it？
A. the owner
B. general contractor
C. subcontractors
D. surveyors
E. architects
F. supervisors
G. project managers
The wall elements can be made of?
A. brick
B. stone
C. opaque glass
D. precast concrete
E. aluminum
Windows and doors can be built of?
A. glass
B. plastics
C. wood
D. aluminum alloy
E. plastic steel
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