单项选择题
W: How much does it cost to send a postcard to the United States by air M: It will be $2.
A.In a bar. B.In a restaurant. C.In a post office. D.In a school.
A.Red. B.Blue. C.Brown. D.Yellow.
A.Type his paper. B.Perform his assignment. C.Move in here. D.Travel in another country.