题型专项突破-Unit3 完形填空（未来生活篇） 一、完形填空 阅读下面短文，从短文后各题所给的四个选项（A、B、C 和 D)中，选出可以填入 空白处的最佳选项。 Mars is not, it seems, the dry old planet we once believed __ (1) _. Astronauts who are __ (2)_ to go there in the next decade may find plenty __ (3)__ water to slake(消除) their thirst. And with water present the __ (4) _ of finding some sort of life on Mars are __ (5)__ brighter. This is the view of forty geologists： 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 __ (9)__ dust storms swirling over vast sandy _ (10)__. But now the picture is very different (11) __mountains and valleys carved by_ (12) _ glaciers and rivers rushing and rumbling deep underground. In a report on the analysis of the Martian pictures Dr. Michael Car of the U. S. Geological Survey comments： “I am convinced__ (13)__ lots of water on Mars. ” Any surface water will be in the__ (14)__of ice. But it could save explorers from__ (15)__ to take so much __ (16)__ with them. The report says__ (17)__Mars probably had a warmer climate in ages__ (18)__ due to its axis (轴) having been more tilted(倾斜的) towards the sun. __ (19)__signs of plant or animal life have been detected by instruments landed on Mars, __ (20)__ the landing vehicles have been sent there for a few years. (1) A. it is (2) A. expected (3) A. to (4) A. chances (5) A. quite (6) A. a few (7) A. skills (8) A.