Пожалуйста помогите заблаговременно спасибо

1. I've found some old photos of my parents.2. Ron has visited Canada twice.3. They haven't understood the question.4. Has he opened his presents yet?5. I'm sorry. We've eaten all the biscuits.6. Have you seen any good films lately?7. Diana hasn't invited lan to the party.8. Have the boys finished with the computer? I need to do some work.9. She has changed her phone number.10. I haven't listened to the new CD yet.1. A - Have you ever been to Australia? B - No, I haven't.2. A - Have they seen a snake? B - Yes, they have.3. A - Has she met someone famous? B - No, she hasn't.4. A - Has he ridden a horse? B - No, he hasn't.5. A - Have you had a toothache? B - Yes, I have.6. A - Have they been late before? B - Yes, they have.