七、阅读短文，回答问题
Yeshe Dolkar still remembers the moment she saw snow leopards (雪豹) at Sanjiangyuan National Nature Reserve a year ago. On that cold snowy day, the 15-year-old Yeshe Dolkar living in Nangqian County, Qinghai Province was going down a mountain with her family. Suddenly, they saw two snow leopards near the river.
Since the mid-20th century, parts of Sanjiangyuan have faced environmental changes such as grassland degradation (退化) and changes in snow, ice and lakes because of climate change and human activities. Many wild animals living in the area are in danger of dying out.
On 24 January 2003, China set up Sanjiangyuan National Nature Reserve to better protect the area and the wildlife there. In these years, the number of wild animals is rising. More than 70,000 Tibetan antelopes (藏羚羊) now live there. And more than 1,000 snow leopards can be found in the area.
Local people have improved their understanding about environmental protection and have tried hard to protect the environment in Sanjiangyuan over the years. According to (根据) Palden Wangchuk, a 22-year-old young man, the local government calls on people to pick up waste on the grasslands. “People would also take their food waste down the mountains. The grasslands have put on a new look,” he said.
1. What was the weather like when Yeshe Dolkar saw snow leopards a year ago?
Cold and snowy.
2. When did China set up Sanjiangyuan National Nature Reserve?
On 24 January 2003.
3. How does the writer show the change in the population (种群) of wild animals?
By giving numbers.
4. What are local people called on to do on the grasslands?
To pick up waste.
5. What does the writer mainly want to tell us through this passage?
Sanjiangyuan National Nature Reserve and its changes.
