Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are __1__ to go there in the next decade may find plenty __2__ water to slake their thirst.
And with water present the __3__ of finding some sort of life on Mars are __4__ brighter.
This is the view of 40 __5__ all over the world who have been analyzing __6__ of pictures and other scientific __7__ obtained by robot explorers in the sixties and seventies.
To begin with scientists thought the Red Planet was as __8__ as the Moon with dust storms swirling over vast sandy __9__. But now the picture is very different with mountains and valleys carved by __10__ glaciers and torrential rivers rushing and rumbling deep underground.
In a report on the __11__ of the Martian pictures Dr. Michael Car of the US Geological Survey comments: I am __12__ theres lots of water on Mars. Any surface water will be in the __13__ of ice. But it could save explorers __14__ to take so much fresh __15__ with them.
The report says __16__ Mars probably had a warmer climate in ages __17__ due to its axis having been more steeply tilted towards the Sun.
__18__ convincing signs of plant or animal life have been __19__ by instruments soft landed on Mars, __20__ only the immediate vicinity of landing vehicles could be examined.
1. A) expected B) hoped C) required D) eager
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