closed book in a sentence

Examples

1. The record may be a closed book, but Betty Gonzales is on a mission.
2. Ford was a closed book for most of his life.
3. Increasingly, however, " victim " countries are refusing to view history as a closed book.
4. It's also harder to count Webb's situation at the Merit Club as a closed book.
5. He persevered and became interested in helping others to whom reading is a'closed book '.
6. Other than that, New England is a closed book.
7. Estrada said he accepted the apology and considered the matter a " closed book ."
8. Events prior to 1928 and the writings of past generations became a closed book ."
9. There is one other fact that Barber cannot evade : Powell's life was a closed book.
10. "Last year is a closed book, it's over.