Раскройте скобки, употребляя глаголы в Present Perfect. 1. I don039;t know

Раскройте скобки, употребляя глаголы в Present Perfect. 1. I don't know this girl. I never (meet) her before. 2. "Where is mother?" - "She just (go) out." 3. "Don't you know what the film is about?" - "No, I (not/see) it." 4. "Don't worry about the letter. I already (post) it." 5. "Is he a good teacher?" - " Oh, yes. He (help) me a lot." 6. He knows London perfectly well. He (be) there several times. 7. I cannot find my umbrella. I think someone (take) it by mistake. 8. "Do you speak Spanish?" - "No. I never (study) it." 9. "Do you know, where they have gone?" - "No. They (sell) their house and (not/leave) their new address."