Multiple choice

Directions: Choose the appropriate word/phrase from the given options and fill in the blank.

Who _______ at the door?

  1. is knocking

  2. was knocking

  3. has been knocking

  4. had been knocking

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The question asks about an ongoing action at the present moment, requiring the present continuous 'is knocking'.