1. In the years between 1937 and 1952, author Margaret Wise Brown _____ more than a hundred books but also wrote the lyrics for 21 children’s records.

2. The small greenish flowers of the American elm tree appear in the spring, _____ .

3. The best way to control rats is by seeing that they have as _____ .

4. _____ map dates back to about 3,000 B.C.

5. A majority of people in the United States can get all the calcium their bodies _____ from the food they eat.

6. Because caricature tends to emphasize the peculiarities of a subject, _____ an effective vehicle for pictorial satire.

7. Daniel Ken Inouye, Hawaii’s first Congressman, was elected to the United States Senate in 1963, where _____ known for his unbiased views on civil issues.

8. Not until the dedication of Yellowstone Park in the late nineteenth century _____ a national park.

9. _____ the precise qualities of the hero in literary works may vary over time, the basic exemplary function of the hero seems to remain constant.

10. The digestive enzyme pepsin breaks down proteins into components _____ readily absorbed by the human body.

11. The tulip tree is native to the eastern United States, _____ the tallest and largest broadleaf tree.

12. Constituting one of the earliest engineering techniques, ______ in Paleolithic time was done in order to extend natural caves.

13. George Washington Carver _____ international fame for revolutionizing agriculture research in the southern United States during the early twentieth century.

14. The planet Venus is almost exactly the same size and mass _____ Earth, with a similar interior, including a nickel-iron core.

15. Over the centuries, _____ that try to explain the origins of the university.