填空 In the --f----,homes will be warm in winter and cool in -

填空 In the __f____,homes will be warm in winter and cool in __s____ ,__s____they'll填空In the __f____,homes will be warm in winter and cool in __s____ ,__s____they'll be very comfortable.We'll __u____ the sun to __h___ our homes.No __o____ will be cold and there __w_____ be lots of __h____ water.