8. Fill in the gaps with yet, resently, how long, never, since, just, so far, for or ever.
1. ... have you been a teacher? 2. Kate has ... cleaned the windows. 3. He hasn't phoned ... Sunday. 4. She has only written one letter ... . 5. Have you ... been to Egypt. 6. Sandra has ... driven a car before. 7. Have you used it ... ? 8.You have known them ... five years. 9. I haven't invited anyone to the party ... . 10. She has been skiing ... she was child.​