more than 50,000,000 people live in the rainforest of the world and most of them do not hurt the forest they live in .they eat the fruits on the forest trees , but they do not cut them down .they kil some animals to eat , but they do not destroy（破坏）them .when we cut down the rainforests , we destroy these forest people , too .in 1900, there were 1,000,000 forest people in the amazon forest .in 1980, there were only 200,000.the yanomami live along the rivers of the rainforest in the north of brazil .they have lived in the rainforest for about 10,000 years and they use more than 2,000 different plants for food and for medicine .but in 1988, someone found gold in their forest , and suddenly 45,000 people came to the forest and began looking for gold .they cut down the forest to make roads .they made more than a hundred airports .the yanomami people lost land and food .many died because new diseases came to the forest with the strangers .the yanomami people tried to save their forest , because it was their home .but the people who wanted gold were stronger .many forest people try to save their forests chico mendes was famous in brazil becaus he wanted to keep the forest for his people “ i want the amazon forest to help al of u - forest people , brazil , and al the earth ,” he said .a few months later , in december 1988, people who wanted to cut down the forest killed chico mendes .in borneo , people were cutting down the forest of the penan people to sel the woo the penan people tried to save their rainforest .they made blockades（障碍）across the roads into the forest .in 1987, they closed fifteen roads for eight months .no one cut down any trees during that time in panama , the kuna people saved their forest .they made a forest park which tourists pay to visit .the gavioes people of brazil use the forest , but they protect it as wel .they find and sel the brazil nuts which grow on the forest trees .44.The number of the people living in the Amazon forest in 1980 was（）of that in 1900.A.halfB.one - thirdC.two - fifthsD.one - fifth45.（）have destroyed the rainforest of the Yanomami .A.the people who picked fruits and kill animals to eatB.the people who use plants for food and medicineC.The people who have lived there for about ten thousand yearsD.the people who made the roads and the airports46.Which of the folowing is WRONG ?（）A.The Penan people closed 15 roads with blockades to save their forest .B .The Penan people were cutting down the trees to sel the wood .C.The Penan people didn ＇ t want otherD.Those who wanted to cut down the trees were stopped at the road blockades .47.In Panama , visitors have to（）before they enter the forest park of the Kuna people .A.buy brazil nutsB.plant treesC.pay for the ticketsD.pay for the gold48.From the passage we learn that（）.A.we need wood to build houses , so we have to cut down treesB.the rainforest people have done something to protect their homeC.to people , gold is more important than treesD.we mustn 't cut down any trees or kil any animals