Ответ:

  1. Did you meet anybody interesting at the party?
  2. I don’t like chocolates, but I ate some last night.
  3. Somebody told me he liked English very much.
  4. She can’t remember anything of what happened to her.
  5. I think you need some help with cleaning the room.
  6. Is there any news from your friend yet?
  7. It was a sad story. Nobody could help him.

В утвердительных предложениях обычно употребляются some/somebody, в вопросах и отрицаниях — any/anybody, а при полном отрицании — no/nobody/nothing.