in (inside/into)

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Across
  1. 2. the amount of money coming in/received
  2. 4. put air into a ball, balloon, tyre etc.
  3. 5. the amount of air or food taken into the body
Down
  1. 1. a patient who lives in hospital
  2. 2. a person/animal/plant with a disease
  3. 3. live in or occupy