60 feet beneath the surface and likely stays fluid because it's covered by snow. They're unsure how old the reservoir is or whether it flows into the ocean.

21. What is true about the water newly found in Greenland?

　A. It came into being only a few years ago. B. It is widely stored between the rocks.

　C. It finally flows into the ocean. D. It is probably in the form of liquid.

22. The discovery of water in Greenland is very important because ______.

　A. it confirms scientists' previous guess about the storage of water in Greenland

　B. it provides information about the possible amount of water storage in Greenland

　C. it throws new light on the relation between Greenland's melt water and sea level rise

　D. it solves the problem of the shortage of fresh water in the world for good

22. What will be the best title of the passage?

　A. Billions of Tons of Water Found under Greenland Ice Sheet

　B. Greenland Ice Sheet Contributing to Rapid Sea Level Rise

　C. Ice Sheet in Greenland Melting at Alarming Speed

　D. Scientists Predicting Massive Underground Water in Greenland

B

The policeman moved along the street, looking strong and important. It was about ten at night, and it was cold. He stopped at doors as he walked along, trying each door to be sure that it was closed for the night.