It’s impolite to enter a room _____ knocking at the door.
A: with
B: without
C: on
D: over
A: with
B: without
C: on
D: over
举一反三
- It’s impolite to enter a room _____ knocking at the door. A: with B: without C: on D: ove
- (5) knocking on the door before you enter the room
- It's impolite to enter the room without _____. A: Permitting B: having permitted C: being permitted D: permission
- When the room attend is knocking the door and nobody answers, can she enter directly to clean the room?
- She entered the room without _______. A: knocking B: being knocked C: knocked D: being knocking