Question

Food and sleep were all we cared about.
(Begin : It...............)

Answer 1

It is about food and sleep that we all cared all about.
Or
It is about food and sleep, we all cared all about

Answer 2

${It} {was} {food} and sleep that we cared all about.}$
OR
${It} {was} all food and sleep that we cared about}$