YOU SAID:
Who could that be knocking at my door?
INTO JAPANESE
誰が私のドアをノックしているのでしょうか?
BACK INTO ENGLISH
Who is knocking on my door?
INTO JAPANESE
誰が扉をノックしているの?
BACK INTO ENGLISH
Who is knocking on the door?
INTO JAPANESE
誰が扉をノックしているの?
BACK INTO ENGLISH
Who is knocking on the door?
That didn't even make that much sense in English.