6. Choose the right answer: 1. "Does your mother know you're in the park?" "Yes, I told/'ve told her." 2. "What is Jane's phone number?" "Sorry, I forgot/have forgotten." 3. I bought have bought a new skirt. Do you like it? 4. My father studied/has studied Astronomy when he was in school. 5.I made/have made lemonade. Would you like some? 6. Who built/has built the Pyramids? 7. John left/has left home 20 minutes ago.