1. Jack left the office before i arrived => When 2. During lunch, someone rang the bell =>While 3. I haven't been to the dentist for 6 months =>The last time 4. She has studied Japanese for 5 years =>She began 5. He did all his work and then e went home =>After 6.Steven bought a new motorbike, but first he saved enough money => After 7. The guests left and then we tidied the house =>When 8. I haven't heard form them for ages => It's ages 9. The postman was bitten by our dog =>Our dog 10. Whose suitcase is this? =>Who dose 11. Alice's strange ideas astonished everybody =>Everybody 12. What's your date of birth? =>When .