Какое из этих предложений активный залог, а какое пассивный: At first

At first the referee thought (активный залог) that it was (активный залог) a joke, but when the player showed (активный залог) at blood on his leg, he had to believe (активный залог) that it was (активный залог) serious. They began (активный залог) again, but a few minutes later, several players climbed (активный залог) out of the water one by one, shouting that somebody had bitten (активный залог) them. There was (активный залог) blood on both players legs. The game was stopped (пассивный залог), and they began (активный залог) to let the water out of the pool. When the players returned (активный залог) to their dressing-room after the game, they found (активный залог) a letter there. I have been (активный залог) a water-polo fan for many years, one of the fans wrote (активный залог) "and I dont like (активный залог) that the game becomes (активный залог) slow and uninteresting, and I have decided (активный залог) to make the players move faster I dont think (активный залог) I can do (активный залог) this well myself, and I have decided (активный залог) that my crocodile will do (активный и залог) it better."