1. They began working in the factory five years ago. (worked) ______________________________________________________________________________________ 2. This is the first time I have visited London, (never) ______________________________________________________________________________________ 3. She last heard about her best friend when she met his mother, (hasnt) ______________________________________________________________________________________ 4. The last time I had a frill English breakfast was two years ago. (for) ______________________________________________________________________________________ 5. They have raised the environmental campaign for several months. (Its) ______________________________________________________________________________________ 6. The students had submitted their papers by the time the bell rang, (before) ______________________________________________________________________________________ 7. Lucy had watched three movies before her friends arrived, (after) ______________________________________________________________________________________ 8. The light had gone out before we got out of the office, (when) ______________________________________________________________________________________ 9. Before the manager explained everything clearly, everybody had left the office, (by the time) ______________________________________________________________________________________ 10. My sister had prepared a big dinner by the time we came home, (before) ______________________________________________________________________________________