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1. After quartz, calcite is the _____ in the crust of the Earth.
2. Regarded as the world’s foremost linguistic theorist, Noam Chomsky continues _____ new theories about language and language learning.
3. _____ any area receives more water than the ground can absorb, the excess water flows to the lowest level, carrying loose mineral.
4. In 1935 seismologist Charles F. Richter devised _____ for rating the strength of earthquakes.
5. After the Second World War the woman wage earner _____ a standard part of middle-class life in the United States.
6. Celluloid and plastics have largely replaced genuine ivory in the manufacture _____ buttons, billiard balls, and piano keys.
7. One of the tenets of New Criticism is that a critic need not tell readers _____ about a story.
8. The outer ear, _____ the fleshy pinna and the auditory canal, picks up and funnels sound waves toward the eardrum.
9. The chair may be the oldest type of furniture, _____ its importance has varied from time to time and from country to country.
10. When wood, natural gas, oil, or any other fuel burns, _____ with oxygen in the air to produce heat.
11. Deserts are arid land areas where _____ through evaporation than is gained through precipitation.
12. When goshawk chicks are young, _____ parents share in the hunting duties and in guarding the nest.
13. Not only _____ among the largest animals that ever lived, but they are also among the most intelligent.
14. Fish are the most ancient form of vertebrate life, and _____ all other vertebrates.
15. _____ 350 species of sharks, and although they are all carnivorous, only a few species will attack people.
16. The dandelion plant has a straight, smoothly, and hollow stem that contains a white, milky juice.
17. Of the much factors that contributed to the growth of international tourism in the 1950’s, one of the most important was the advent of jet travel in 1958.
18. The Canadian province of Alberta it is believed to have some of the richest oil deposits in the world
19. Elizabeth Bishop’s poems are frequently long and carefully constructed, uses elaborate rhyme or half-rhymes.
20. California has more land under irrigation than any another state.
21. Thomas Moran’s magnificent, colorful paintings onto Wyoming landscapes captured the spirit of the western wilderness in the late nineteenth century.
22. Emily Dickinson, among the greatest women poets in the English language, died with all of hers poems unpublished, except for seven that appeared in publications of limited circulation.
23. Protecting Florida’s coral reefs is difficult because some of the corals are very fragile: even the touch of a diver’s hand can kill it.
24. Martin Luther King, Jr., is well known for organize the huge human rights march that took place in Washington in 1963.
25. A lightning flash produces electromagnetic waves that may travels along the Earth’s magnetic field for long distances
26. One of the earliest plants domesticated in the Western Hemisphere, manioc was introducing to Europe by Spaniards returning from the New World
27. Beside the age of nine and fifteen, almost all young people undergo a rapid series of physiological changes.
28. The frequency of meteors in the Earth’s atmosphere increases when the Earth passes through a swarm of particle generated by the breakup of the comet.
29. Ponds are noted for their rich and varied types of plant and animal life, all maintain in a delicate ecological balance.
30. In the 1920’s cinema became an important art form and one of the ten largest industry in the United States
31. To improvise effectively, a musician must thorough understand the conventions of a given musical style.
32. During the Jurassic period plant life was abundance, providing herbivores in particular with a plentiful supply of food.
33. Some maple trees are raised for their sap, which has a high sugar content for yields
sugar and syrup.
34. Long before boats became important in recreation, they were valuable to people for many essential tasks, included transportation and fishing.
35. Asteroids may be fragments of a planet shattered long ago or from material the nuclei of old comets
36. The first Native Americans to occupy what is now the southwestern United States were the Big-Game Hunters, which appeared about 10,000 B.C
37. Some hangers, buildings used to hold large aircraft, are very tall that rain occasionally falls from clouds that form along the ceilings.
38. Most sand dunes are always in motion as wind pushes sand upward one side of each dune, over the top, and down the other side.
39. Farms of maize, beans, and tobacco, the Wendat, Native American tribes that inhabited present-day Michigan, lived a sedentary life in densely populated villages
40. Recently scientists have apply new tools of biochemistry and molecular biology to investigate the structure of human hair.