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 托福閱讀真題 Desert formation Task(3)

11 It can be inferred from the passage that the author most likely believes which of the following about the future of desertification?

○ Governments will act quickly to control further desertification.

○ The factors influencing desertification occur in cycles and will change in the future.

○ Desertification will continue to increase.

○ Desertification will soon occur in all areas of the world.

12 Look at the four squares [■] that indicate where the following sentence can be added to the passage.

This economic reliance on livestock in certain regions makes large tracts of land susceptible to overgrazing.

Where would the sentence best fit?

13-14 Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.

Many factors have contributed to the great increase in desertification in recent decades.

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Answer Choices

○ Growing human population and the agricultural demands that come with such growth have upset the ecological in some areas and led to the spread of deserts.

○ As periods of severe dryness have become more common, failures of a number of different crops have increased.

○ Excessive numbers of cattle and the need for firewood for fuel have reduced grasses and trees, leaving the land unprotected and vulnerable.

○ Extensive irrigation with poor drainage brings salt to the surface of the soil, a process that reduces water and air absorption.

○ Animal dung enriches the soil by providing nutrients for plant growth.

○ Grasses are generally the dominant type of natural vegetation in semiarid lands.