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第2部分：阅读判断(第16～22题，每题1分，共7分) 下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提 供的是正确信息，请选择A;如果该句提供的是错误信息，请选择B;如果该句的信息文中没有提及，请选择C. Monarch without a Kingdom This November， a hundred million butterflies will drop from the sky over Mexico， like autumn leaves. But for how long? Genetically modified maize (玉米) could mean extinction for this beautiful butterfly， Rafael Ruiz reports. Although its body is about 3 cm long and it only weighs 1 gin， the Monarch butterfly manages to travel 5，000 km each year. It seems to be so fragile， but its long journeys are proof of its amazing ability to survive. This autumn， the Monarch butterfly will once more set out on its journey from the US. It will keep going until it reaches Mexico. It travels these huge distances to escape the cold weather in the north. In November， millions of Monarchs fall like bright， golden rain onto the forests in the mountains of central Mexico. In the silence of these mountains you can hear a strange flapping (拍动) of wings， as the Monarchs arrive at their destination. In the mountains， which reach a height of 3，000 metres， the butterflies are safe. Before reaching their journeys end they have faced strong winds， rain and snowstorms and they do not all manage to reach their destination. When the winters are really bad， perhaps 70 per cent of them will not survive. Their long journey to Mexico is thought to be one of the most amazing events in the whole of the American continent. When they get there they will stay until the beginning of April， when their internal calendar tells them that it is time to go back. The long journey， with all its dangers， begins again. | 
