Here's the completed text with the verbs in the Past Simple form:
Yesterday I arrived home from work at six o'clock. Then I played with my dog, Rex, in the garden. It was cold so after half an hour, we stopped our game and I stayed TV. Rex tried with me. He loves watching TV! At seven o'clock I was hungry so I cooked to make some pancakes. They were delicious!
The extra verb is 'watch'.