This is ...
netting
These are ...
skyscrapers
This is ...
wood
This is ...
cement
This is ...
a terraced house
This is ...
straw
This is ...
steel
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a bungalow
This is ...
a villa
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a cottage
This is ...
a castle
These are ...
bricks
This is ...
bamboo
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a detached house
This is ...
a hut
These are ...
concrete blocks
This is ...
a semi-detached house
This is ...
a block of flats / an appartment block