名校最新大学英语四级阅读精讲的系列讲义：(132)_大学英语阅读

名校最新大学英语四级阅读精讲的系列讲义：(132)

　　3.C。

　　乍得湖区域缺乏降雨的处境已持续几十年了。客观事实题。关键语句： They say the area has suffered from a lack of heavy rain for more than thirty years. 因此C)选项正确。而因文中 Four nations surround Lake Chad. A)错误; He says people still can get water from the lake to drink and for crops. B)错误; Scientists say the problem is expected to worsen in the coming years as the population and demand for water continue to increase. D)错误。

　　4.D。

　　由于湖区的水源被抽取过多导致计算机数据在八十年代与实际不符。客观事实题。关键语句： The researchers say major irrigation systems were built in the Nineteen-Eighties. The systems took water from two rivers that flow into Lake Chad. The Chari and Logone rivers carry most of the water that enters the lake. The study showed the increased irrigation reduced the flow in the two rivers. Climate changes also were responsible for the reduction. Today the flow of the two rivers has been reduced by almost seventy-five percent. 可见一方面是湖区水源抽取过多,另一方面是天气情况变得恶劣，D)正确。A), C)在文中均未提及。B)不应是directly,且用于drink也不妥当。

　　5.A。

　　科学家对乍得湖区的前景持不乐观态度。态度判断题。关键语句: Scientists say the problem is expected to worsen in the coming years as the population and demand for water continue to increase. 且从贯穿全文的语气可以看出不抱乐观态度。