Built at the beginning of the century, the Library of the Congress houses one of the largest.................. collections of books in the worlD.

In the preparation of fibrous material for production uses, stiff woody fibers from plants.................. fibers from animal sources.

Farmers look forward to .................... every summer.

Chosen as the nation's capital at the end of the American Civil War,.................. a city of over a million people.

People usually can get a sufficient amount of the calcium their bodies.................. from the food they consume.

Hollywood, the heart of America's motion picture industry,.................. of Los Angeles a century ago.

In order for people to work together effectively, they need.................. each other's needs.

Within an area of only 100 miles, Death Valley sinks to 282 feet below sea level while Mount Whitney,.................. to a height of 14,494 feet.