Use the Past Simple or the Present Perfect Simple.

1. John hasn't called me for two days. (Present Perfect) 2. They bought a new car last month. (Past Simple) 3. The teacher hasn't returned the tests yet. (Present Perfect) 4. How long has she known about this problem? (Present Perfect) 5. Have you ever heard such a story? (Present Perfect) 6. I lived in England for two years. (Past Simple) 7. He bought me a beautiful gift for my birthday last year. (Past Simple) 8. I am so excited to have a dog. I have always wanted one. (Present Perfect)