this是特指There is someone outside the door .Go and see who____

this是特指There is someone outside the door .Go and see who____ There is someone outside the door . Go and see who______is. ----There's someone at the door.Who____ it be Is it the post 英语 .There's someone at the door.Can you go and see who _____ 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 —Someone is knocking at the door. —Yes, I’ll go and see who 一道英语填词题There is someone knocking at the door.Please go and s There is somebody at the door .I go and see who it is . there is ( ）knocking at the door.GO and see who it is A nobo Someone is ringing the doorbell .Go and see .A.w There is somebody knocking at the door .Go to see( ) it is.