{{i}}{{B}} quEstions 17 to 20 ArE BAsED on thE Following monologuE ABout EnErgy ConsErvAtion. you now hAvE 20 .sEConDs to rEAD quEstions 17 to 20.{{/i}}{{/B}}

whAt is thE purposE oF BuilDing nEw housEs FACing north or southA．to AvoiD DirECt sunlight.
B．to limit spACE usED、
C．to kEEp out thE ColD、
D．to ConForm to othEr housEs.