1: 1. mixed grades 4 and 5: draw lots. Divide a, b and c into three groups of signatures. Three groups together, the winner of the same group is the first game, the winner of each group (the remaining three) is the second game, and the winner is the first game.
2. Level 4 is better than Level 5: the principle of horse racing in Tian Ji.
Two. Zhang Gang first, then Chen Ming last, Li Hong ... The time period is ahead. ...
Three. Nine dollars