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跟踪论文参考文献：
A
We begin this topic by discussing the region of the United States known as the Northeast. This region includes 11 states and a all area called the District of Columbia, which is the home of the national government.
The Northeast is a very important part of the United States, for although it covers only about six percent of the nation’s area, it contains around one-fourth of the country’s population. New York, the most popular city in the United States, and several other large cities lie in this region.
Why are these 11 states so important? In the first place, the Northeast was one of the first sections of the country settled by Europeans. Busy cities developed there when most of America was still sparsely （稀疏地） settled. Many important events in the nation’s early history took place there, such as the Boston Tea Party in 1773, which took place immediately before the Revolutionary War broke out.
Today the Northeast is a great manufacturing （制造业） and trading region. Thousands of factories produce a wide variety of goods and provide other regions of the country with items they need. Many large manufacturing firms he their head offices here. Some of the country’s largest banks, investment agencies, and publishing houses are found in the Northeast. Several of its cities are noted for their fine museums. Some of the country’s best known colleges and universities are also found in this region.
Finally the Northeast is where the major part of the country’s inter-national trade takes place. In the heart of this region, in New York city, is the home of the United Nations.
1. What is the District of Columbia?
A. One of the states of the Northeast.
B. The area in which the nation’s capital lies.
C. The most popular city in the United States.
D. The home of people working in the government.
2. In Paragraph 2 the Northeast at present is described as ___ .
A. a large area with a large population
B. a large area with a all population
C. a all area with a all population
D. a all area with a large population
3. Why is the Northeast an important part of the United States?
A. Many tourists visit it every year.
B. It is the home of many modern historians.
C. It is a historical, business and cultural center.
D. It was never a wasteland like most of the country.
4. What is the passage mainly about?
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跟踪导练（五）
选词填空用方框里单词的正确形式填空，使其句意完整。每空一词，有两个词是多余的。trainexpertfrightenabandonrelax。
跟踪导练（三）
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跟踪导练（二）
ADuring my high school years， the most important thing was what I was w。