Spaceships of the future will be （）

单项选择题Who benefited the least from fridges according to the author（）

A．Inventors.
B．Consumers.
C．Manufacturers.
D．Traveling salesmen.

单项选择题The statement “In my fridgeless Fifties childhood, I was fed well and healthily.”(Line 1, Para. 2) suggests that（）

A．the author was well-fed and healthy even without a fridge in his fifties
B．the author was not accustomed to using fridges even in his fifties
C．there was no fridge in the author' s home in the 1950s
D．the fridge was in its early stage of development in the 1950s