-ge or -dge??

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Across
  1. 2. The person in charge of the courtroom.
  2. 4. A police officer's identification.
  3. 5. The place where performers perform.
  4. 7. I ______________ allegiance to the flag...
Down
  1. 1. A chocolate delight often used to top ice cream
  2. 3. A pet bird will often live in this.
  3. 5. A person you do not know
  4. 6. Doors have 3 of these that enable it to open and close