题目内容：

Asia’s mountain glaciers (冰川) will lose at least a third of their mass through global warming by the century’s end, with serious consequences for millions of people who rely on them for fresh water, researchers have said. The high mountains of Asia consist of a geographical region surrounding the Tibetan Plateau, holding the biggest store of frozen water outside the poles. It feeds many of the world’s great rivers, including the Ganges, the Indus and the Yarlung Zangbo River, on which hundreds of millions of people depend.

Nearly 200 nations adopted the Paris Agreement in 2015, which sets the goal of limiting warming to a level of “well below” 2°C, while “pursuing efforts” to achieve a lower ceiling of 1.5°C. Earth’s surface has already warmed by about 1°C, according to scientists.

The Asian high mountains, the new study said, were already warming more rapidly than the global average. A global temperature rise of 1.5°C would mean an average increase in the region of about 2.1°C, with differences between mountain ranges - all of which will warm by more than 1.5°C. The Hindu Kush mountain range would warm by about 2.3°C and the eastern Himalaya Mountains by 1.9°C, the study forecast.

“Even if temperatures stabilize at their current level, (glacier) mass loss will continue for decades to come,” the researchers added. “For the high mountain glaciers to survive, it is vital to reduce the global temperature increase to the lowest possible level.”

A study in July in the journal Nature Climate Change said there was only a 5% chance of holding global warming under 2°C. For 1.5°C, the chance was about 1%. On current trends, some experts project Earth is on track to warm by about 3°C.

1.What is stressed about Asia’s mountain glaciers in the first paragraph?

A. The reason for its melting.

B. Its importance.

C. Its geographical condition.

D. The consequences caused by its decrease.

2.What do we know about the temperature on the earth’s surface?

A. It keeps up its normal level.

B. It has risen too much since the Paris Agreement was made.

C. It is far below the level that the Paris Agreement demands.

D. It is near the lower ceiling that the Paris Agreement demands.

3.How may we guarantee these glaciers, continued existence, according to researchers?

A. Hold global warming under 2°C.

B. Try to save water as much as we can.

C. Keep global temperature increase to a minimum.

D. Make the global temperature stable at its current level.

4.How does the author develop the passage?

A. Giving examples.    B. Describing.

C. Presenting data.    D. Comparing.