must ask(a,an,无)permission before you enter the room选哪个
must ask(a,an,无)permission before you enter the room选哪个
you must ____(knock)on the door before you enter
——at the door before you enter my room A knock B knocking Ck
______ at the door before you enter my room, please. A.Knock
改错.Knock before you enter into the room.
______ at the door before you enter my room,please.
You must enter the room password. 中文什么意思
you should knock at the door before you the room.为什么用enter而不
Before you enter the teacher"s office ,you must (k ) on the
please knock at the door before you enter the room(同义句转换)
Please knock at the door before you enter the room .(同义句转化))
Don't enter into the room before they tell you to do that.修改