Our city was very small 50 years ago.There was a r( ).There were many t( ) by the side.There was a
a r( ),too.There was a b( ) over it.There was a f( ) and there weren't many p( ).Now our city is very big.There are many h( ).There are some big b( ),too.There are many f( ) and f( ).There is a s( ).There are t( ) and f( ).There are many p( ),too.