A. Put in the correct verb form (have/has):

Пояснение:

Для правильного образования Present Perfect Simple необходимо использовать вспомогательный глагол 'have' или 'has' (в зависимости от подлежащего) и третью форму глагола (Past Participle).

Решение:

• 1. They have listened
• 2. We have changed
• 3. She has drunk
• 4. He has taken
• 5. They have helped
• 6. My friends have visited
• 7. I have done
• 8. You have sold
• 9. It has made
• 10. My cousin has opened