单选题
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 (消除) 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
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. But now the picture is very different with mountains and valleys carved by
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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
there"s 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
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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,
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only the immediate vicinity (靠近) of landing vehicles could be examined.
【正确答案】
A
【答案解析】[解析] 考查动词词义辨析。expect sb. to do sth. 指“期待某人做某事”，常常用于被动语态，最符合本题题意。require sb. to do sth. 意思是“命令某人做某事”，是正式用语，若用在这里显得语气过重；be eager to do指“渴望做某事”，不符合句意；hope指“希望”，但是它不能用于“宾语+不定式作宾补”的格式，故A正确。
【答案解析】[解析] 考查名词词义辨析。尽管information和intelligence都有“消息，情报”的意思，且都是不可数名词，但科技情况或消息通常用scientific and technological information表达，而市场信息、军事情报等多用intelligence表示，本题句意为：这是40位地质学家的看法，他们一直在分析成千上万的火星图片和六、七十年代机器人探测到的科学信息。
【答案解析】[解析] 考查固定搭配。save sb. from doing sth. 是固定搭配的动词短语，意为“省去(某人的劳力)”，from可以省略。原文中在explores后面省略了from，句意为：……它却可能使探险家们省的自己带那么多的水，动词carry是及物动词，不与不定式to take搭配，且语意上与take重复，也可排除D选项。因此，答案为B，意为“不得不”。