Xiao Wang, Xiao Zhang, Xiao Li, Xiao Gu four roommates predict the results of an exam. 'I think everyone can pass this time, ' Xiao Wang said. Xiao Zhang said, How is that possible? Can't you see I'm depressed? Xiao Li said, Xiao Gu is certainly no problem. Gu said, Please! If I don't have a problem, everyone will have no problem. When the results were published, it was proved that only one of the four was wrong.
wrong?
Xiao Wang