1. ……………… social crusade aroused Elizabeth Williams’enthusiasm more than the expansion of educational facilities for immigrants to the United States.

2. ………………….. as 2500 B.C., the Egyptians used mirrors made of highly polished metal.

3. The quantum theory states …………….., such as light, is given off and absorbed in tiny definite units called quanta or photons.

4. Quails typically have short rounded wings that enable ………………. spring into full flight instantly when disturbed in their hiding places.

5. Geysers are found near rivers and lakes, where water drains through the soil ……………….

6. Algebra generalizes certain basic laws …………….. the addition, subtraction, multiplication, and division of all numbers.

7. Even at low levels, ……………………

8. In the textile industry, the term “gunny” refers to ……………..burlap that is not of the best quality.

9. The skyscraper, ……………, is an architectural form that originated in the United States.

10. ……………….. were stones piled at intervals.

11. The windmill, which has been used for hundreds of years to pump water and grind grains, ……………. redesigned to produce electricity.

12. In 1938, when Benny Goodman’s orchestra presented a concert at the prestigious Carnegie Hall, …………… was clear that jazz had at last been fully accepted.

13. …………….. a continuous mass of water on the Earth’s surface, all continents are islands in the strictest sense of the word.

14. The spiral threads of a spider’s web have a sticky substance on them …………… insects.

15. ……………… are not leached out of soil, reclamation procedures are needed to restore the land’s productivity.

16. Some procedures used for laboratory analysis of archaeological specimens are ………… procedures conducted in crime laboratories.

17. For hundreds of years, sailors relied on echoes to warn them of another ships, icebergs or cliffs in foggy weather.

18. Although he is employed in the scientific and technical fields, the metric system is not generally utilized in the United States.

19. Beneath the deep oceans that cover two-thirds of the Earth, intriguing secret of the planet are concealed.

20. The pioneer John Chapman received the “Johnny Appleseed” because he planted apple seedlings during him travels in what are now Ohio, Indiana, and Illinois

21. A radio telescope is an instrument that collects and measured faint radio waves given off by objects in space.

22. Yosemite National Park it has many spectacular natural attractions, including Yosemite Falls,One of the world’s highest waterfalls.

23. The private satellite industry sprang up in the mid-1960’s to relay not only television broadcasts but too phone calls and computer data.

24. During the Colonial days, the Iroquois had an agricultural economy basing mainly on corn with supplementary crops of pumpkins, beans, and tobacco.

25. Before the retina of the eye can be examined, the pupil must to be artificially dilated.

26. The most widely writer praised of the 1960’s in the United States was probably Joyce Carol Oates, who published many novels and short stories.

27. The word “shore” can be used rather of “coast” to mean the land bordering the sea.

28. Physical fitness activities can lead to an alarming variety of injuries if participants push themselves greatly hard.

29. Alaska’s rough climate and terrain divide the state into isolated regions, making highway maintenance difficulty.

30. The structure but behavior of many protozoans are amazingly complex for single-celled animals.