6.听第四段材料,回答第18至第20小题. 18.How often does the man run? A.Once a week. B.Once a day. C.Once a month. 19.What does the man do first after he gets up? A.He takes a shower. B.He has breakfast. C.He goes to school. 20.What's the man's favorite subject? A.English. B.Math. C.PE.