TOEFL结构100句及其答案和分析.docVIP

TOEFL结构100句及其答案和分析(1) 以下的句子中，每句都有一个错误，请把这个错误改过来。 1.A major step in the development of algebra was the evolution of an accurate understand of negative quantities. 2. If television had been invented a thousand years ago, will nations be significantly more homogeneous than they are now? 3. To the citizens of the United States, the bald eagle, Americas national bird, symbolize strength and freedom. 4. authenticity stained glass is colored while the glass is in a liquid state. 5. On most scales, zero marks the starting point or the neutralize position. 6. Traditionally, ethnographers and linguists have paid little attention to cultural interpretations given to silence, or to the types of social contexts in which tends to occur. 7. The research of Percy Julian has contributed to the creation of drugs that are in widespread use over victims of arthritis. 8. The Appalachian Trail, extending approximately 2020 miles from Maine to Georgia, is the longer continuous marked footpath in the world. 9. When rainbows appear, they are always in the part of the sky opposite directly the Sun. 10. Benjamin Franklin drew a political cartoon that is credited raising 10000 volunteers for the American Revolutionary War. 11. Luminescence refers to the emission of light by means another than heat. 12. George Washington Carver found hundred of uses for the peanut, the sweet potato, and the soybean and thus stimulated the cultivation of these crops. 13. Since 1971 the regional corporations set up in Alaska by Congress managing everything from fishing to banking. 14. The metal aluminum has been first isolated early in the nineteenth century. 15. The boiled point of any liquid is determined by the pressure of the surrounding gases. 16. On May 20, 1932, Amelia Earhart become the first woman fly solo across the Atlantic Ocean. 17. Industrial buyers are responsible for supplying the goods and services that an organization required for its operations. 18. The field of dynamics in ph