1. For how many years Ken had been smoking before he gave it up?
2. Why the house was dirty?
3. What I realized?
4. How much work did I do yesterday?
5. When the weather was fine?
6. What did Alan do when I saw him last time?
7. Where was Carol wearing a really nice dress?
8. When were we driving when the car broke down?
9. Who many years ago lived a poor life?
10. Whom did Tom said that he/she have to arrive 40 minutes before?