1、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
2、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)
3、_ 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： “
4、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
5、 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 B. it C. it to be D. was(2) A. expected B. hoped C. required D. sent (3) A. to B. of C. more D. in(4) A. chances B. openings C. o
6、ccasions D. possibility(5) A. quite B. very C. much D. more(6) A. a few B. many C. thousand D. thousands(7) A. skills B. news C. intelligence D. information(8) A. peaceful B. quiet C. lifeless D. dead (9) A. of B. with C. for D. through(10) A. deserts B. mountains C. rivers D. seas(11) A. from B. be
7、tween C. for D. with (12) A. energetic B. great C. heavy D. powerful (13) A. theres B. therere C. heres D. herere(14) A. appearance B. way C. form D. shape(15) A. have B. having C. carry D. carrying(16) A. water B.ice C. equipment D. oxygen(17) A. what B. if C. how D. that(18) A. pass B. past C. ago
8、 D. before(19) A. Not B. No C. Nor D. Never (20) A. probably B. perhaps C. supposed D. although参考答案：(1) C 此处为定语从句，关系代词省略了，在从句中作表语，根据 once 可排除A 项。 (2) A 句意：在下下一个十年有望登上火星的宇航员也许会找到大量的水来消除这里的干渴。expect 意为“期盼;预测”，常与不定式连用。(3) B plenty of 意为“大量的”。(4) A 句意：有了水，在火星上找到某种生命的机会就更大了。根据系动词 are可排除 possibility。chanc
9、e 意为“可能性;机会”。(5) C much 修饰比较级，表示“得多”。(6) D 此处表示 “很多照片 ”，many 修饰可数名词复数，表示“很多”。(7) D 地质学家研究分析的应该是在六七十年代由机器人获取的火星的一些“信息”。(8) C 一开始，科学家认为火星和月球一样是有生命存在的。(9) B 作定语修饰月球，表示月球上有沙尘暴。(10) A 根据 sandy 可知，此处指沙漠。(11) D 作定语修饰 picture，表示图片上有被冰川冲刷形成的山谷。(12) D 修饰 glaciers and rivers，因为冲刷成了山谷的形状，故用 powerful 修饰。(13) A 句
10、意：我确信火星上有很多水。water 为不可数名词，故 there be 句型应该用 there is 形式。(14) C in the form of 意为“以形式” 。句意：任何表面水都是以冰的形式存在的。(15) B 句意：这样可使探险者不用再携带很多水登上火星了。From 是介词，后为动名词形式，表示“携带”。(16) A 根据上文内容可知此处指水 (17) D 报告说，在多年前，火星可能更温暖，因为倾斜的角度更大。that 在从句中不作成分。(18) B 此处表示多年之前。(19) B 句意：通过火星上的设备没有找到有生命的迹象。修饰名词，表示“没有”应用 no。(20) D 根据句意及句子结构可知，此处引导让步状语从句。
