最新英語專四考試完形填空專項訓練

愛因斯坦曾經説過：“天才和勤奮之間，我毫遲疑的選擇勤奮，她幾乎是世界上一切成就的催生婆!”愛因斯坦説的極是，一步登天，那時不可能的.!天上絕不會“掉下餡餅”來。勤奮才是天才的一個開端，只有一直勤奮下去，天才才會向我們招手。以下是小編為大家搜索整理的最新英語專四考試完形填空專項訓練，希望對正在關注的您有所幫助!更多精彩內容請及時關注我們應屆畢業生考試網!

Growth of trade will depend greatly on availability of energy sources. There may still be a trillion barrels of recoverable oil in the Middle East. But the oil crisis of 1974 has 11 to renewed interest in coal and to a search for 12 sources of energy. Solar, geothermal, and nuclear energy will play a large role in the years to come.

Solar energy is available in 13 forms. Buildings can be heated and cooled by direct use of solar radiation, crops and trees, which are the most efficient converters of sunlight into energy, can be grown for their energy potential, wastes can be burned as 14 , sunlight can be converted into DC (direct current) electricity, electric power can be 15 from the sun-warmed surface waters of the ocean, and lastly, solar radiation can be converted into heat that will drive electric power generators. Serious problems still remain as to 16 and storage of solar energy.

Geothermal energy is the energy contained within the earth. Heat is abundantly available deep in the earth's core and is constantly being produced. However, this heat is usually located at too deep a level for 17 exploitation. In short, very little is known on the use of geothermal energy, and it has 18 been exploited.

Nuclear energy is produced in nuclear power plants. At these plants atoms of uranium are split, thus 19 masses of energy. Another source of energy

under development is the nuclear fusion of certain atoms of hydrogen. This could eventually 20 natural gas as a source of energy.

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II. E 12. F 13. J 14. C 15. I 16. M 17. G 18. A 19. L 20. D

The economy of the United States after 1952 was the economy of a well-fed, almost fully employed people. Despite 11 alarms, the country escaped any postwar depression and lived in a 12 of boom. An economic survey of the year 1955, a typical year of the 1950's, may be typical as 13 the rapid economic growth of the decade. The national output was 14 at 10 percent above that of 1954(1955 output was estimated at 392 billion dollars). The production of manufactures was about 40 percent more than it had 15 in the years immediately following World War I . The country's business spent about 30 billion dollars for new factories and machinery. National income 16 for spending was almost a third greater than it had been in 1950. Consumers spent about 256 billion dollars; that is about 700 million dollars a day, or about twenty-five million dollars every hour, all round the 17 . Sixty-five million people held jobs and only a little more than two million wanted jobs but could not find them. Only agriculture 18 that it was not sharing in the boom. To some observers this was a sad reflection of the mid-1920's. As farmers' share of their products 19 , marketing costs rose. But there were, among the observers of the national economy, a few who were not as confident as the majority. Those few seemed to fear that the boom could not last long and would

20 lead to the opposite—depression.

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II. H 12. D 13. O 14. E 15. B 16. N 17. M 18. L 19. G 20. A