Помогите номер 1, сколько сможете

1. She has just gone out. 2. She has left the room recently. 3. We haven't yet solved the problem. 4. The students have already passed the exam? 5. The morning was cold and rainy, but since ten o'clock the weather has changed and now the sun is shining brightly. 6. Show me the dress which you have made. 7. I saw you walking along the street the other day with a heavy bag in your hand. 8. Last week-end we has went to the country, but the rain has spoiled all the pleasure. 9. My watch was going in the morning, but now it has stopped. 10. - When did you open the window?  - I opened it ten minutes ago.