Listen! ________ is knocking on the door. Go and see who it

Listen! ________ is knocking on the door. Go and see who it someone is knocking at the door （）i go and see who it is A s someone is knocking at the door .（）i go and see who it is A there is ( ）knocking at the door.GO and see who it is A nobo —Someone is knocking at the door. —Yes, I’ll go and see who Listen!Who is knocking at the door? --Listen! Someone is knocking at the door. Who _____it be? ---Listen! Someone is knocking at the door. Who _____it be? There is somebody knocking at the door .Go to see( ) it is. There is somebody at the door .I go and see who it is . who is knocking on the door ___must be Helen. someone is knocking at the door.who [ ]it be?