Para completar as frases usando a forma correta do verbo "be" no passado simples, precisamos usar "was" e "were". Aqui está a forma correta para cada frase: 1. Where were you yesterday? 2. I was at the park last weekend. 3. They were in New York for two weeks. 4. She was happy when she heard the news. 5. My friends were tired after the long hike. 6. He was sick for a few days last month. 7. We were late for the concert. 8. The weather was cold and rainy yesterday. Portanto, as formas corretas do verbo "be" no passado simples são "was" e "were", dependendo do sujeito.