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1、TEM-4 Exercise 10 Reading Directions: There are 11 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). Passage 1Questions 1 to 3 are based on the following passage:Canals are watercourses constr
2、ucted to improve and extend natural waterways. They are generally built to facilitate transportation, but from the beginning they have been used for many additional purposes including draining swamps, irrigating land for cultivation, and promoting economic development.Canals are often classified by
3、the size of vessel they can accommodate. Some small local canals, which are able to float only 100 to 300 ton boats or small rafts of timber, may be only 3 feet deep. Major barge canals generally range from 6 to 9 feet in depth, and some are as much as 10 or 12 feet deep. These canals can carry 1,35
4、0 to 2,000 ton craft. Ship canals are 25 feet or more deep and are capable of accommodating large vessels in the seagoing class. Canals may also be classified as either water level or lock canals. Water level canals do not vary in height along their courses. The best known of these is the Suez Canal
5、, which is at sea level. Lock canals, which include most modern waterways, contain locks, or special devices for raising and lowering boats along their courses by changing the depth of the water. Each lock is a stretch of water enclosed by gates at each end. After a boat enters the lock, water is le
6、t or drained out until it reaches approximately the same level as the water ahead. 1. What does the passage mainly discuss?A. How canals are constructed.B. Common types of canal boats and barges.C. The worlds largest canals.D. How canals are used and classified.2. What is the purpose of a canal lock
7、?A. To keep out boats that are too large for the canal.B. To measure the tonnage of canal boats.C. To load and unload the cargo.D. To change the depth of the water.3. The Suez Canal is mentioned as an example of a _.A. modern canalB. water level canalC. lock canalD. irrigation canalPassage 2Question
8、s 4 to 7 are based on the following passage: Glacier National Park in Montana shares boundaries with Canada, an American Indian reservation, and a national forest. Along the North Fork of the Flathead River, the park also borders about 17,000 acres of private lands that are currently used for ranchi
9、ng, timber, and agriculture. This land is an important part of the habitat and migratory routes for several endangered species that frequent the park. These private lands are essentially the only ones available for development in the region.With encouragement from the park, local landowners initiate
10、d a land use planning effort to guide the future of the North Fork. The park is a partner in an inter-local agreement that calls for resource managing agencies to work together and with the more than 400 private owners in the area. A draft plan has been prepared, with objective of maintaining tradit
11、ional economic uses but limiting new development that would damage park resources. Voluntary action by landowners, in cooperation with the park and the county, is helping to restrict small lot subdivisions, maintain wildlife corridors, and minimize any harmful impact on the environment.The willingne
12、ss of local landowners to participate in this protection effort may have been stimulated by concerns that congress would impose a legislative solution. Nevertheless, many local residents want to retain the existing character of the area. Meetings between park officials and landowners have led to a d
13、ramatically improved understanding of all concerns.4. The passage mainly discusses _.A. the endangered species in Glacier National ParkB. the protection of lands surrounding Glacier National ParkC. conservation laws imposed by the state of MontanaD. conservation laws imposed by Congress5. Why are th
14、e private lands surrounding Glacier National Park so important?A. They function as a hunting preserve.B. They are restricted to government use.C. They are heavily populated.D. They contain natural habitats of threatened species.6. The relationship between park officials and neighboring landowners ma
15、 y best be described as _.A. indifferentB. intimateC. cooperativeD. disappointing7. It can be inferred from the passage that a major interest of the officials of Glacier National Park is to _.A. limit land development around the parkB. establish a new park in MontanaC. influence national legislation
16、D. settle border disputes with CanadaPassage 3Questions 8 to 11 are based on the following passage: Most earthquakes occur within the upper 15 miles of the earths surface. But earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one e
