Put the elements into the gaps

Fill in the gaps with the idioms.

• An apple a day
• as pale as a ghost
• at death's door
• back on his feet

1. Have an apple for a snack, instead of those burritos.
   [ ]
   keeps the doctor away, after all.
2. My grandmother was
   [ ]
   when she entered the hospital.
3. The office manager was
   [ ]
   after his heart attack.
4. My father is
   [ ]
   after being sick for three weeks.