I don’ t mind _____the door.
— ______ did you visit the Great Wall?— Last Sunday.
Roast duck is one of _______ dishes in Beijing.
I’d like to go swimming with you, ______ I am too busy today.
I ______ in the hospital yesterday. I had to look after my sick mother.
— May I smoke here?— No, you ______ . This is a no-smoking room.