. D. 细节理解题。根据第三处景点“Europe：Iceland”介绍的最后一句话可知，在春秋季节去冰岛旅游可以看到北极光。

　　. B. 主旨大意题。根据文章的题目和内容，可概括文章的写作目的是提供关于生态旅游的信息，换言之推荐一些生态旅游的去处。76. kept→ keep

　　77. sport →sports 78. when→ while

　　79. were→ are 80. that → it

　　81. safely→ safe

　　82. Therefore→ However, 83. 去掉to 84. √

　　85I would like to be a volunteer in my spare time. My reasons are as follows:

　　First of all, it is a good virtue to help others, even in modern society. We all need others’ help in case we get into trouble. Secondly, we are able to better ourselves by helping others because we gain valuable experience and build up our confidence while serving others. What’s more, volunteering makes us feel better about ourselves, thus making our life more enjoyable. More importantly, we can make the world a better place to live in by volunteering to improve it.

　　In summary, volunteering can make a difference to our life, so I think it is very rewarding to be a volunteer.

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