A．Separate houses were built for storing ice.B．Double walls were built in icehouses to keep cool.C．Blocks of ice were packed with hay in icehouses.D．Ice was put into icehouses in winter.
A．Separate houses were built for storing ice.
B．Double walls were built in icehouses to keep cool.
C．Blocks of ice were packed with hay in icehouses.
D．Ice was put into icehouses in winter.