It’s cold outside. ______ your sweater before you go out.
Mr. White is my English teacher. He ______ in this school for about 5 years.
After he finished ______ the exciting story, he talked about it on and on with his friends.
— ______ 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.