听下面一段话,回答1-3题 1.Why is Yang Mei going to the United States? A.To see the man’s grandma. B.To see her parents. C.To work there. 2.How long will Yang Mei stay there? A.Seven months. B.Half a year. C.Fifteen weeks. 3.What do you think is the cheapest way for people to travel in America? A.By bus. B.By car. C.By train.