Question

... I come in ? A) may. B) have.C) could. D) do​

Answer 1

Ответ:

May I come in? -  Могу я войти?

Объяснение:

Answer 2

... I come in?

May I come in?

Answer 3

The correct answer is:

C) could.

So the complete sentence would be: "Could I come in?"