There is _____ knocking at the door. Go and see who it is. [

there is ( ）knocking at the door.GO and see who it is A nobo 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 somebody knocking at the door .Go to see( ) it is. ---someone is knocking at the door.Who _____ it be? —Someone is knocking at the door. —Yes, I’ll go and see who Listen! ________ is knocking on the door. Go and see who it There is somebody at the door .I go and see who it is . 6.There is someone knocking at the door,who _____ it be? someone is knocking at the door.who [ ]it be? who is knocking at the door? 1.----Who is knocking at the door