Respostas
1. She finished her homework two hours ago
2. He played soccer yesterday
3. Maria and John have cooked lunch, now they can play outside.
4. We have packed our bags, now we can travel.
5. They have studied for the final test, so they will pass.
6. Tom and Mary have a house in London and now they have bought a new one in New York.
7. Many year ago my parents have bought a new car.
8. She has found a great job and she is enjoying it a lot.
9. The teacher has started her master degree at Florida University last year.
10. My parents have traveled to England last year.
11. He has cooked for his girlfriend and I think its very nice.
Note que usamos a fórmula "have/has" + verbo no passado quando não sabemos especificamente o tempo da oração. Mas usamos somente o verbo no passado quando temos especificado o tempo em que ocorreu a ação.