Every day an adult elephant eats about 200kg of plants like bamboo, grass and watermelon seeds. His body system breaks the plants into 50kg of fibers, which can produce 115 sheets of fibrous paper.

　　The first step to make this special natural paper is to collect the fiber rich “dung” from the elephant. The next step is to wash it and boil it for five hours to kill bacteria. (The water they use in this process is reused to water plants at the Centre, which, in turn, feed the elephants). After it's boiled, they cut fibers up. During the cutting process, they add in the desired color of the paper. For the fourth step, they take the mixture and make balls of 300g. Each ball is then spread lightly over bamboo frames to dry into one large sheet of paper. After a few hours in the sun, the sheets are dry enough to remove. The result is a wonderful, 100% natural, recycled paper. People around the world are getting interested in buying this special elephant paper for their holiday cards, writing paper and much more, because it's beautiful, natural and helps so many.

　　20. Why are there few elephants in Thailand today than before?

　　A. Because they don't have enough food.

　　B. Because they were killed in the war.

　　C. Because the technology develops very fast.

　　D. Because the Mahouts don't want to keep them. 答案与解析：C　第二段中提到原因。泰国大象数量锐减是因为“科技的进步，大象过去的工作方式被淘汰”。

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