1. Often invisible, always in motion, gas is _____ of matter.

2. Not until the First World War _____ to improve the road system in the United States.

3. Though a respected educator, Alexander Graham Bell _____ the inventor of the telephone.

4. Areas of fertile soil called deltas, usually _____ are formed by mud deposited at the mouth of a river.

5. Managers often receive considerable training in the “technical” aspects of their jobs _____ very little in the “people management” aspects.

6. _____ of minerals, which are chemical elements or compounds of varying purity.

7. Sandra Day O’Connor, the first woman member of the United States Supreme Court, believed that the courts should interpret the laws _____ legislate.

8. _____, some of the Earth’s interior heat escapes to the surface.

9. Sarah Frances Whiting opened the _____ of physics in the United States in 1878.

10. The gibbon ranges over _____ other apes do.

11. _____ angles of any triangle always add up to 180 degrees

12. _____ that book American art out of the fomanticism of the mid 1800’s and carried it to the most powerful heights of realism.

13. _____ that ornithischians, planteating dinosaurs, lived about 225 million years ago.

14. The coherent light of a laser _____ entirely of synchronized waves of a single frequency that travel in the same direction.

15. The acting of Mary Ann Duff was characterized by subdued dramatic force, fidelity to ____, and a marked unity of effect.