A．The Great Barrier Reef.

　　B．Venice.

　　C．Glacier National Park.

　　D．The Amazon.

　　【解题导语】本文是一篇说明文，介绍了地球上几个快要消失的名胜及它们快要消失的原因。

　　1．C　细节理解题。根据第二段前三句"Rising air temperatures will cause sea temperatures to rise as well.All life supported by the oceans will be affected with this shock to their ecosystem.Coral are some of the most vulnerable marine animals and we are already watching whole reefs disappear."可知，海水温度的升高会导致珊瑚的死亡。故选C。

　　2．B　推理判断题。Sprawing across(横跨) hundreds of small islands in Northeast Italy，Venice is at extreme risk of sinking into the Adriatic Sea.(第三段第一句)

　　译文：横跨意大利东北部的数百个小岛，威尼斯面临着下沉到亚得里亚海的极端风险。

　　根据关键句可推知，威尼斯很多地方有下沉到海平面以下的危险。故选B。

　　3．A　细节理解题。Located in Montana, Canada, this park is over a million acres and has a huge plant and wildlife population.(第四段第二句)

　　译文：位于加拿大的蒙大拿州，这个公园占地超过一百万英亩，拥有大量的植物和野生动物种群。

　　根据关键句可知，蒙大拿州的冰川国家公园占地面积巨大。故选A。

　　4．D　推理判断题。The cause behind the disappearance of these fantastic places ultimately comes down to humans.(倒数第二段第一句)

　　译文：这些神奇的地方消失背后的原因最终归结为人类。

　　根据关键句可知，亚马孙河的消失主要是由人类活动造成的，而其他几个地方的消失是由气候等自然问题造成的。故选D。

　　长难句分析：As temperatures rise, the glaciers and ice melt，which will upset the ecosystems sustaining over a thousand plant species and hundreds of animals.(第四段最后一句)

　　分析：本句是主从复合句。As引导时间状语从句；the glaciers and ice melt是主句；which引导非限制性定语从句。

　　译文：随着气温的升高，冰川和冰雪在融化，这将破坏维持一千多种植物和数百种动物的生态系统。

　　B

　　(2018·青岛市高考模拟检测)

　　Mark felt that it was time for him to take part in his community，so he went to the neighborhood meeting after work.The area city council(委员会)woman was leading a discussion about how the quality of life was on the decline.The neighborhood faced many problems.Mark looked at the charts taped to the walls.There were charts for parking problems，crime，and for problems in vacant buildings.Mark read from the charts，"Police patrols(巡逻)cut back, illegal parking up 20%."People were supposed to suggest solutions to the council woman.It was too much for Mark."The problems are too big，"he thought.He turned to the man next to him and said，"I think this is a waste of my time.Nothing I can do would make a difference here."

As he neared the bus stop on his way home，Mark saw a woman carrying a grocery bag，and a baby.As Mark got closer，her other child，a little boy，suddenly dashed into the street.The woman tried to reach for him，but as she moved，her bag shifted(滑落)，and groceries started to fall out.Mark ran to take the boy's arm and led him back to his mother."You gotta stay with Mom，"he said.Then he picked up the fallen groceries while the woman smiled in relief."Thanks，"she