What Could This Be?

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Across
  1. 3. Never gonna give ____ up
  2. 6. The question I'm trying to ask you
  3. 7. Letter in the alphabet
  4. 8. Will you be ____ 4 down?
Down
  1. 1. The name of my love
  2. 2. Hello, _____ , Goodbye
  3. 4. The name of your love
  4. 5. ____ Smith