Ответ:

  1. A) full — the correct expression is “What is your full name?”
  2. C) on — “on” is used with a specific date.
  3. There is no grammatically correct option among A–C. The natural sentence would be: “There is some food in the cupboard.”

Ответ: 1 — A, 2 — C; в предложении 3, вероятно, допущена ошибка или пропущено слово.