Раскройте скобки, употребляя глаголы в Past Indefiniteили Present Perfect: 1. At last I (to do) all my homework: now

1. At last I have done all my homework: now I shall go out. 2. The building of the house began early in April. 3. The rain has stopped but a cold wind is still blowing. 4. We have already solved the problem 5. He has come a moment ago. 6. I have never spoken to him. 7. He has just finished his work. 8. Did you make any spelling mistakes in your dictation? 9. It was very cold yesterday. 10. When did you meet him? 11. I haven\'t seen him since 1987. 12. How many mushrooms have you gathered?