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1、http:/老托福阅读真题 PASSAGE 90老托福阅读真题 PASSAGE 90托福阅读的思维方式就是托福阅读的出题方式，只有掌握了这种思维方式，才有可能在做题之前，预测到新托福阅读题的出题形式和特点，为找答案节省时间。老托福阅读试题的核心价值，在于其最贴近真题的阅读思维方式。此外老托福阅读真题老托福阅读真题比新托福 IBT 阅读文章要短，比较容易适应。这也是大家在备考托福的时候非常重要 的一点。因为前期的入手如果能从容易的开始，就会形成一个循序渐进的过程方式，让大家的练习有一个提高的过程。既然老托福阅读试题有这样的效果，那我们如何利用那有限的真题来达到锻炼自己的目的呢?事实上这就一个办法
2、，就是坚持。本期为大家推荐老托福阅读的真题 PASSAGE 90，有原文及答案，希望对托福考生备考有所帮助。Perhaps one of the most dramatic and important changes that took place in the Mesozoicera occurred late in that era, among the small organisms that populate the uppermost, sunlitportion of the oceans the plankton. The term plankton is a broad one
3、, designating allof the small plants and animals that float about or weakly propel themselves through thesea. In the late stages of the Mesozoic era, during the Cretaceous period, there was a greatexpansion of plankton that precipitated skeletons or shells composed of two types of mineral:silica and
4、 calcium carbonate.This development radically changed the types of sediments that accumulated on theseafloor, because, while the organic parts of the plankton decayed after the organisms died,their mineralized skeletons often survived and sank to the bottom. For the first time inthe Earths long hist
5、ory, very large quantities of silica skeletons, which would eventuallyharden into rock, began to pile up in parts of the deep sea. Thick deposits of calcareousooze made up of the tiny remains of the calcium carbonate-secreting plankton alsoaccumulated as never before. The famous white chalk cliffs o
6、f Dover, in the southeast ofEngland, are just one example of the huge quantities of such material that amassed duringthe Cretaceous period; there are many more. Just why the calcareous plankton were so prolificduring the latter part of the Cretaceous period is not fully understood. Such massive amou
7、ntsof chalky sediments have never since been deposited over a comparable period of time.http:/The high biological productivity of the Cretaceous oceans also led to ideal conditionsfor oil accumulation. Oil is formed when organic material trapped in sediments is slowlyburied and subjected to increase
8、d temperatures and pressures, transforming it intopetroleum. Sediments rich in organic material accumulated along the margins of the TethysSeaway, the tropical east-west ocean that formed when Earths single landmass (known asPangaea) split apart during the Mesozoic era. Many of todays important oil
9、fields are foundin those sediments in Russia, the Middle East, the Gulf of Mexico, and in the statesof Texas and Louisiana in the United States.1. What does the passage mainly discuss?(A) How sediments were built up in oceans during the Cretaceous period(B) How petroleum was formed in the Mesozoic e
10、ra(C) The impact of changes in oceanic animal and plant life in the Mesozoic era(D) The differences between plankton found in the present era and Cretaceous plankton2. The passage indicates that the Cretaceous period occurred(A) in the early part of the Mesozoic era(B) in the middle part of the Meso
11、zoic era(C) in the later part of the Mesozoic era(D) after the Mesozoic era3. The passage mentions all of the following aspects of plankton EXCEPT(A) the length of their lives(B) the level of the ocean at which they are found(C) their movement(D) their size4. The word accumulated in line 8 is closes
12、t in meaning to(A) dependedhttp:/(B) matured(C) dissolved(D) collected5. According to the passage , the most dramatic change to the oceans caused by planktonduring the Cretaceous period concerned(A) the depth of the water(B) the makeup of the sediment on the ocean floor(C) the decrease in petroleum-
13、producing sediment(D) a decline in the quantity of calcareous ooze on the seafloor6. The white chalk cliffs of Dover are mentioned in line 14 of the passage to(A) show where the plankton sediment first began to build up(B) provide an example of a plankton buildup that scientists cannot explain(C) pr
14、ovide an example of the buildup of plankton sediment(D) indicate the largest single plankton buildup on Earth7. The word prolific in line 17 is closest in meaning to(A) fruitful(B) distinct(C) determined(D) energetic8. The word ideal in line 20 is closest in meaning to(A) common(B) clear(C) perfect(D) immediatehttp:/9. The word it in line 22 refers to(A) biological productivity(B) oil(C) organic material(D) petroleum参考答案：CCADB CACC参考答案：CCADB CACC以上就是本期整理的老托福阅读真题，考生可进行参考训练以提高自己的考试水平。若您想了解托福考试更多相关信息请关注前程百利。
