C. Leave the door of the copy room open, when there is a meeting or people working next door.
举一反三
- (you, lock, always) the door to your apartment when you (leave)
- Don't forget _________ (lock) the door when you leave the laboratory.
- When the room attend is knocking the door and nobody answers, can she enter directly to clean the room?
- What should the room attendant say when knock on the guest’s door:
- Will you leave the door open?(请把划线部分的句子成分写在下面的横线上) __________