Is Maria knocking at the door ? ------It( )be her. She is in

Is Maria knocking at the door ? ------It( )be her. She is in Is Lucy knocking at the door?No.It _____ be Lucy.She is in J Who______ it be that is knocking at the door? 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 . （中考英语）--Is Maria knocking at the door Someone is knocking at the door.Who it be?— It be Tom.He is Someone is knocking at the door.____ is it? -Who ＿＿it be that is knocking at the door -It＿＿b Someone is knocking at the door.___ it be Venis?—No,it ___ b Who is knocking at the door?---_____ may be Mary.A.She B.He