The Shanghai Expo has had a major impact upon China. It is the first World Expo _________ in a developing country in the event’s 159-year history.
— I’d like to go to the cinema with you, Dad. — Sorry, my darling, but the film is ____ for adults only.
—$1,500, but that’s my last offer. — OK. It’s a ____.
He left home in 1980 and has never come back ____.
— Hello, may I have an appointment with the doctor? — ____
— How about a game of chess? — ____