Mars is not, it seems, the dry old planet we once believed it to be. Astronau

游客2023-07-30  27

问题    Mars is not, it seems, the dry old planet we once believed it to be. Astronauts who are【C1】______to go there in the next decade may find plenty【C2】______water to slake(消除)their thirst.
   And with water present the【C3】______of finding some sort of life on Mars are【C4】______brighter.
   This is the view of 40【C5】______all over the world who have been analyzing【C6】______of pictures and other scientific【C7】______obtained by robot explorers in the sixties and seventies.
   To begin with, scientists thought the Red Planet was as【C8】______as the Moon with dust storms swirling over vast sandy【C9】______. But now the picture is very different with mountains and valleys carved by【C10】______glaciers and torrential rivers rushing and rumbling deep underground.
   In a report on the【C11】______of the Martian pictures Dr. Michael Car of the U.S. Geological Survey comments,  "I am【C12】______there’s lots of water on Mars." Any surface water will be in the【C13】______of ice. But it could【C14】______explorers having to take so much fresh【C15】______with them.
   The report says【C16】______Mars probably had a warmer climate in ages【C17】______due to its axis having been more steeply tilted towards the Sun.
【C18】______convincing signs of plant or animal life have been【C19】______by instruments soft. landed on Mars,【C20】______only the immediate vicinity of landing vehicles could be examined.  [br] 【C3】

选项 A、chances
B、openings
C、occasions
D、opportunities

答案 A

解析 名词辨析。本句意为:有了水的存在,在火星上发现某种生命的更有希望。由于第二个空格要填入的是比较级的修饰词,所以该空格不影响对句子的理解,因此只要集中判断第一个空格即可。chances意为“可能性”;opening意为“职位的空缺;有利的环境”;occasion意为“合适时机”; opporturnity意为“机会”,侧重指做某事的条件或时机。
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