老师：Hello everyone. Welcome to my class. In this class, you will explore the writing purpose of the tax and practice reading to determine literal and implied meaning. And also you will practice using new vocabulary and its different forms in context.
老师：Now let's have a brief review of the tax of last period. Do you still remember the graceful Tibetan antelopes we read about last period? Because of their valuable fare, they were killed by hunters for commercial profits, and the building of roads and railways also caused their habitats to become smaller and smaller. As a result, they were once endangered. Fortunately, effective measures were taken and the Tibetan antelope was protected. Bridges and gates were added to let them move easily and safely.
老师：The volunteers walked over the antelopes day and night to keep them safe. After reading the text for several times, I believe you are quite familiar with the tax. So today we are focusing on the deeper understanding of the tax. Now we're going to have another chance to read the text again. And then please read after the recording. After reading, please find out the purpose of the text. Now please listen and read after reading and thinking. 2 read the text and answer the questions. A day in the clouds. The air.
学生：Is thin and we have to rest several times on the short hike from camp. To our left, snow covered mountains disappear into clouds that seem almost close enough to touch on the plane. In front of us, we can just make out a herd of graceful animals. This is why we're here, to observe Tibetan antelopes. Tibet and antelopes live on the plains of Tibet, Xinqiang and Xinhai. Watching the move slowly across the green grass, I'm struck by their beauty. I'm also reminded of the danger they are in. They are being hunted illegally for their valuable fur.
学生：My guide is Jessie, a villager from Changtang. He works at the Changtang National Nature Reserve. The reserve is a shelter for the animals and plants of Northwestern Tibet. To Jasi, the land is sacred and protecting the wildlife is a way of life. We're not trying to save the animals, he says. Actually, we're trying to save ourselves.
学生：The 1980s and 1990s were bad times for the Tibetan antelope. The population dropped by more than 50%. Hunters were shooting antelopes to make profits. Their habitats were becoming smaller as new roads and railways were built. In order to save this species from extinction, the Chinese government placed it under national Protection. Jarsy and other volunteers watched over the antelopes day and night to keep them safe from attack. Bridges and gates were added to let the antelopes move easily and keep them safe from cars and trains. The measures were effective. The antelope population has recovered. And in June
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