—Someone is knocking at the door. Is it Ann?
Someone is knocking at the door.____ is it?
someone is knocking at the door.who [ ]it be?
---someone is knocking at the door.Who _____ it be?
-----Someone is knocking at the door.It ____ be Tom .
--Listen! Someone is knocking at the door.
Someone is knocking at the door.Who it be?— It be Tom.He is
Someone is knocking at the door.___ it be Venis?—No,it ___ b
someone is knocking at the door,who is it? A this is a polic
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
Open the door!Someone is knocking at it.It _____ Mr Zhang.He
Someone is knocking at the door,but who can____ be?