People often wonder why historians go to so much trouble to preserve millions of books, documents and records of the past. Why do we have libraries What (1)_____ are these documents and the (2)_____ books Why do we (3)_____ and save the actions of men, the negotiations of statesmen and the (4)_____ of armies Because, sometimes, the voice of experience can (5)_____ us to stop, look and listen. And because, sometimes, past records, (6)_____ interpreted, can give us (7)_____ of what to do and what not to do. If we are to create (8)_____ peace forever, we must seek (9)_____ origins in human experience and in the record of human (10)_____. From the story of the endurance, courage and (11)_____ of men and women, we create the inspiration of youth. From stories of the Christian men, right down to Budapest"s heroic men of today, history records the suffering, the self-denial, the loyalty and the heroic (12)_____ of men. Surely from these records there can come help to mankind in our (13)_____ and perplexities, and in our yearnings (14)_____ peace. The (15)_____ purpose of history is a better world. History gives a warning to those who would (16)_____ war. History (17)_____ inspiration to those who seek peace. (18)_____, history helps us learn. Yesterday"s records can keep us from (19)_____ yesterday"s mistakes. And from the pieces of mosaic assembled by historians come the great printings (20)_____ represent the progress of mankind.

A. its
B. our
C. his
D. her