Ⅲ.综合运用

A Warning on Global Warming

Last November，a huge iceberg broke from Grey Glacier（格雷冰川）in a national park in Chile（智利）.The iceberg is more than three times the s__1__of Chile's national stadium，according to a glaciologist.

The size of the break s__2__many scientists.Events like this are d__3__to rising global temperatures,said a climate change expert.

The glacier in the national park has been receding for years.Photographs from the past 12 years show how the glacier has receded.But such breaks from glacier in the park have not h__4__since the early 1990s.

Usually,glaciers melt and f__5__into lakes and rivers.The huge blue-white ice is now floating freely in a nearby lake.It will threaten passing boats and ships once it moves out to sea and b__6__up into smaller pieces.It will also cause a rise in the sea level.

There are 24,133 glaciers in Chile.These icebergs are very important to local ecosystems.But experts say that human activities are threatening them.In the future,more glaciers will break or melt due to global w__7__.

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