听力原文
Ice boots and a pick are essential. The beginner follows behind the group leader. They are attached by a secure rope, just in case.

Only the most experienced ice walkers know which is the safest and easiest route to take. On the Bodalsbreen,there are 1 levels of difficulty in the climbs offered ensuring visitors get their money's worth. And it's only when you are climbing a glacier that you'll appreciate its vastness. You are unlikely to bump into anyone else along the way.

This is not an easy walk. Walking on a glacier requires intense concentration.

The leader goes first to test uncertain points and make sure the ice will hold. The glacier begins to melt right on the edge and just one wrong step could result in a serious accident. But serious accidents on Norway's glaciers are rare. It's clear that without the proper safety measures in place,this beginner would have slid a long way on the 2 ice. The constantly moving glacial ice means the landscape is always changing,no two trips are the same. Walking on a giant river of ice is a pretty exceptional experience. Many people get glacial fever and want to do it again. With enough practice and training, eventually people can tour the glaciers unguided.

From the ice to the sky,both of these sports require a lack of fear. This is a great place to learn how to sky-dive. These guys love the adrenaline rush that only jumping out of a plane can deliver. In the extreme sports town of Voss,these teachers have been taking their new students through dummy runs for days.

注释: ①adrenaline: n. [生化] 肾上腺素
②dummy run: 试演；试车

课后题目: 学习完后，你能告诉我文章中空缺的单词吗？
听力答案
①varying ②smooth