An nouncement The swimming pool of Shanghai University will be open to the public on July 10th this year． Time:8:00 a.m.—8:00 p.m. Fee:RMB 2 yuan/hr for an adult RMB 1 yuan、hr for a child Please bring your own swimming suits． Shanghai University How much will a grown-up pay if he stays in the swimming pool for 2 hours ____________________________________________________________