【正文】 rican exports was represented by cotton. In contrast, wheat and wheat flour posed only 6 percent of the value of American exports in that year. Clearly, cotton was king in the trade of the young republic. The growing market for cotton and other American agricultural products led to an (25) unprecedented expansion of agricultural settlement, mostly in the eastern half of the United Stateswest of the Appalachian Mountains and east of the Mississippi River. 1. The main point of the passage is that the eighteenth and nieenth centuries were a time when (A) the European textile industry increased its demand for American export products (B) mechanization of spinning and weaving dramatically changed the textile industry (C) cotton became a profitable crop but was still timeconsuming to process (D) cotton became the most important American export product 2. The word favored in line 2 is closest in meaning to (A) preferred (B) remended (C) imported (D) included 3. All of the following are mentioned in the passage as reasons for the increased demand for cotton EXCEPT (A) cotton39。s eastern seacoast. Shortstaple cotton required a much shorter growing season, but the shortness of the fibers and their mixture with seeds meant that a worker could handprocess only about one pound per day. Whitney39。s, the 188039。s resources. C D 17. Titanium has the strength of steel but weighs half only as much, hence its advantage A B C for use in aircraft. D 18. Protective behaviors of amphibians include hiding in the presence of danger and A B having coloration such closely matching the environment that the animal is not 6 C D obvious. 19. As the highestpaid star of the silent screen, earning a reputedly ine of $20, 000 A B C a week, Gloria Swanson epitomized the glamour of Hollywood in the 192039。s Institute for the Study of the History, Life, and Culture of Black People. (A) Margaret Walker did (B) Margaret Walker (C) Margaret Walker who (D) Margaret Walker and 12. Before the Europeans arrived, American Indians were using virgin copper …... into ornaments, knives, and other artifacts. (A) Which was hammering (B) which hammered (C) was hammered (D) hammered 13. In western North America, …...... form the Great Divide, which separates the areas from which waters flow either eastward to the Atlantic or westward to the Pacific. (A) the Rocky Mountains (B) where the Rocky Mountains (C) the Rocky Mountains in which (D) there are the Rocky Mountains 14. Some ecologists believe ….... more than 50 percent of existing species will be lost in the next 100 years. (A) because (B) that (C) while there is (D) that there are 15. Almost ….... substances expand in volume when heated and contract when cooled. (A) all (B) they all (C) all of (D) all are 16. A children39。s. 47. (A) To discover how long their ancestors lived. (B) To analyze how their appearance has evolved. (C) To find out how a disease has spread (D) To determine how closely groups of turtles are related. 48. (A) To demonstrate Gee Washington39。t hold the soil together. (C) The wrong types of plants are left standing. (D) There is a buildup of plant and animal matter. 43. (A) It can cause flooding in an (B) It can carry diseases that affect animals. (C) It can introduce too much salt into the soil. (D) It can divert water from important crops. 44. (A) A possible explanation for why green turtles nest in certain locations. (B) Physical differences among various groups of green turtles. (C) Several examples of mating behavior in green turtles. (D) The impact of continental drift on the diet of green turtles. 45. (A) Teach their young how to swim. (B) Mate and lay eggs. (C) Hide from predators. (D) Eat different kinds of fish. 46. (A) Its geography is similar to Brazil39。s not always clear why people behave in certain ways. (B) People usually blame others for their mistakes. (C) Certain conditions cause drivers to behave strangely. (D) The reason for some behavior is obvious. 38. (A) They usually accept responsibility. (B) They blame factors beyond their control (C) They plain about their personal problems. (D) They pare their behavior to the behavior of others. 39. (A) Settlement patterns in desert. (B) Causes of desertification. (C) Plant adaptation to desert conditions. (D) Regions most affected by desertification. 40. (A) It receives more nutrients than it can absorb. (B) It bees oversaturated with water. (C) It loses the ability to support insect life. (D) It loses nutrients that aren39。re unable to control the person39。s behavior. (B) Common causes of anger. (C) Changing people39。t familiarize themselves with the campus (D) They don39。s far from the academic buildings. (B) No buses go to it. (C) There are few firstyear students living there. (D) It39。t find their dormitory. (C) Their dorm rooms have been given to other students. (D) They39。t know that Matthew planned to move to Oakville. (D) She wants to buy a car from Matthew. 3 31. (A) They39。t start on time. 30. (A) She doesn39。t necessary to attend the lecture. (B) There isn39。s directions. (C) It only rained in a small area. (D) She doesn39。t as good a worker as the boss thinks. (C) The boss plans to give Ed a raise in salary. (D) The boss hasn39。t need a new bicycle, (D) She doesn39。t help the man make his decision (B) A bicycle isn39。t understand what the man said. 25. (A) He has invited many people to (B) He intentionally cooked a lot of soup. (C) He doesn39。t planning to transfer to a different university. 23. (A) Start cleaning sooner. (B) Hire a