(It is)(There is) someone at the door.

(It is)(There is) someone at the door. ----There's someone at the door.Who____ it be Is it the post Someone is knocking at the door.____ is it? There is someone knocking at the door.It may ________ (be) t 6.There is someone knocking at the door,who _____ it be? Look!There is someone _____(敲）at the door. there is someone knocing at the door改为否定句 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.同义句改写：There is ___ ___ at th