Ответить на вопросы в Present Perfect 1 Have you had dinner

1. Have you had dinner yet? - No, I havent. 2. Have you had coffee today? - Yes, I have. 3. Has your brother left for Kiev? - No, he hasnt. 4. Has she ever met my elder brother? - No, she hasnt. 5. Has Mary been to the canteen yet? - Yes, she has. 6. Have you found anything to your taste on the menu? - No, I havent. 7. Have they paid for the lunch yet? - No, they havent.