7.听下面一段材料,回答第18至第20题. 18.How much will Jason pay if they stay in the hotel for one night? A.﹩200 B.﹩400 C.﹩800 19.Which meal is offered for free? A.Breakfast B.Lunch C.Supper 20.Who is the speaker probably? A.Jason's secretary B.A tour guide C.A hotel clerk.