Don't come in before knocking at the door.
Don't come in before knocking at the door.
I’ve been knocking at the door.I don’t think anybody is in.翻
It isn't very (p?)to come without knocking at the door.(按首字母
Please_____on the door before you come in.
——at the door before you enter my room A knock B knocking Ck
We make it a rule to knock at the door before you come in.I
who is knocking at the door?
1.----Who is knocking at the door
Listen!Who is knocking at the door?
--Listen! Someone is knocking at the door.
--Who's knocking at the door?
There is someone knocking at the door.It may ________ (be) t