Have you ever thought about your life after you grow up? It is not easy --- that's what some US students say after they try out adult   life at school. Mount Logan Middle School, Utah, has an activity called Reality Town. Each student gets a "job" and some money. The higher the grade  , the better the job they can get. Then, they have to pay for different things in the real world, such as transportation   and groceries . Some of them have a "husband  " or a "wife" and maybe a few "kids". Student Jason Peisley, 13, became a father with a 5-year-old girl. The hardest part for him was paying taxes  ."I make $90,000 (571,000 yuan), but after I pay my taxes, I only have $66,000 left," he said. " _ " "It's a _ for these students," said Greg Aullman, a teacher at Mount Logan, "to learn how much it costs to live. So, they'll study harder than before and love their parents more. " According to the passage, what is not easy for students in Mount Logan School .?
Doing their homework. Having exams. Going to school. Growing up.