| 21. | Up to now, the subject of his father has been a closed book, at least publicly.
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| 22. | The KGB archives are still a closed book,
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| 23. | Before Japanese companies close books on March 31, they often repatriate their overseas assets into yen.
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| 24. | The history of postwar American art, far from a closed book, has only started to be written.
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| 25. | Some exams ( known as " reviews " in Davidson vernacular ) are take-home, timed, and closed book.
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| 26. | But it's not a closed book.
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| 27. | Before Japanese companies close books at the end of March, they often repatriate their overseas assets into yen.
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| 28. | The left hand holds a closed book with a richly decorated cover featuring the Cross, representing the Gospels.
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| 29. | First, because it's a closed book.
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| 30. | The American John Malkovich acted in the star-studded Marcel Proust adaptation " A Closed Book " ( 2010 ).
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