体验英语第三册U1~4答案.doc

U1 A1 While some visitors to Singapore expect a high-tech city, there are also some parts of the island that still reflect how it used to look before urban development took over. In one of the main Central Nature Reserves, monkeys still roam freely, living side by side with humans. The macaques have grown accustomed to being fed, so they look to humans as a source of food. But this in itself is problematic. As the monkeys depend more on humans for food, they venture further from their natural habitat, a phenomenon that has worried experts. There is just not enough space. Essentially, in much of Southeast Asia we’ve seen a lot of habitat loss where rainforest has been destroyed and converted into human settlement. Singapore is a very urbanized city, and it’s taken a lot of space, so there is not much space left for long-tailed macaques. We really need to stop encroaching into nature reserves. We need to stop building the houses so nearby the reserves, which then causes the problem of the macaques coming into people’s houses and raiding them. These macaques are French species so they live on the edges of the rainforests. If humans keep building the houses so near the reserves, there will definitely be a constant human-macaque conflict issue. After all, the macaques are essential to maintaining the rainforest’s ecosystem. More should be done to protect them. Home Listening A conservation group says 163 newly discovered species of plants and animals in the Greater Mekong region of Southeast Asia where the Mekong River flows are at risk of extinction because of rising global temperatures. Some of the most unusual animals included a frog with fangs in Thailand that eats birds and a leopard-spotted gecko found on an island in Vietnam. But in a report released in Bangkok on Friday, the WWF says that temperatures in the region are expected to rise by as much as four degrees Celsius in the n