句型转换
(1)I really don't know what I should eat for breakfast. (改为简单句)
I really don't know   eat for breakfast.
(2)My sister Linda watches three hours of TV in the evening. (对划线部分提问)
  TV does your sister Linda watch in the evening?
(3)The audience screamed excitedly when David Beckham appeared on the stage. (保持句意基本不变)
The audience screamed  when David Beckham appeared on the stage.
(4)People hold the World Cup every four years. (改为被动语态)
The World Cup every four years.
(5)If you don't take more exercise every day, you will be much fatter. (改为祈使句)
  exercise every day, or you will be much fatter.