Incan and Spanish cultures.可知历史学家们可知在这里参观联合国教科文组织世界遗产遗址，体验印加文化和西班牙文化的融合。故选A.

【3题详解】

推理判断题。根据Great Barrier Reef中large amounts of coral bleaching (褪色) caused by rising ocean temperatures put this place's continued existence at risk, so plan your visit soon to see this awesome sight up close.可知海洋温度升高造成大量珊瑚褪色，对大堡礁的存在造成了威胁。由此可推断如果温度继续升高，大堡礁可能会消失。故选D.

【点睛】细节理解题具体方法与步骤如下：

1.略读材料，大概了解原文，掌握中心或主旨。本文介绍了四处假期极好的去处及各自特色。

2.按文章的体裁，作者写作的组织模式及有关的信息词。如for example, first, second...等预测应该到何处寻找自己所需要的事实。

3.将精力放在寻找你所需要的细节上。快速通篇跳读，全文扫视，找到细节出处，待找到含细节句子时，放慢速度，仔细核对比较内容，直至找到答案。如小题1根据St. Lucia中plan to hike the Piton Mountains or dive in the waters of Anse Chastanet.和Banff. Alberta中From hiking and whitewater rafting to skiing and snowboarding, Banff offers travelers an abundance of year-round outdoor activities.可知在St. Lucia和 Banff人们都可以徒步旅行。小题2根据Machu Picchu中a visit to this Peruvian UNESCO World Heritage (遗产) site is a once-in-a-lifetime adventure.和Spend a few days accustoming yourself to the altitude in the neighboring city of Cusco, where you can experience a mix of Incan and Spanish cultures.可知历史学家们可知在这里参观联合国教科文组织世界遗产遗址，体验印加文化和西班牙文化的融合。

　　After a terrible electrical accident, which caused him to become both blind and deaf, the whole world became completely dark and quiet for Robert Edwards for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family, especially his wife, did their best to tend and comfort him and finally he regained the will to live.

One hot summer afternoon, he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet,