Complete the summary below. Choose ONE WORD ONLY from the passage for each answer. Write your answers in boxes 20-25 on your ans

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问题 Complete the summary below.
Choose ONE WORD ONLY from the passage for each answer.
Write your answers in boxes 20-25 on your answer sheet.
                    Space for an increased population
According to the writer, the use of land for 【R20】______is the most serious threat to the environment. However, in the US, there has already been an increase in the amount of land used for 【R21】______and forests. Far less land would be required to feed the world’s population if the 【R22】______of the land could be improved worldwide. It has also been claimed that the industrial production of animal foods could allow greater access to animal 【R23】______by the entire world’s population. Scientists could use 【R24】______from domesticated animals to help produce meat by tissue cloning, and these species could then be allowed to die out. In addition to this type of meat, 【R25】______will also be widely available.
【R20】

选项

答案agriculture/ farms / farmland

解析 Paragraph 5: However, in fact the increasing amount of land consumed by agriculture is a far greater danger than urban sprawl. Stopping the growth of farms is the best way to preserve many of the world’s remaining wild areas. But is a dramatic downsizing of farmland possible?
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