Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
下面的文本有一些空格。点击每个空格会出现一组选项，请为每个空格选出最合适的答案。
At the height of summer in the Antarctic, tourist ships move gently around the coast. Even 30 years ago such sights would have been unthinkable, but today people are willing to pay large sums of money to see the last real wilderness in the world. In the Arctic, careless human exploitation has damaged the fragile ecosystem. Today concerned governments are trying to find ways to develop the region caring for the very special natural environment. the Antarctic is less accessible than the Arctic, it is still largely undamaged by humans, although holes in the ozone layer above the Antarctic have . Many people believe that one way to preserve the area is to make the whole region into a world park, with every form of exploitation internationally .
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