Mars is not, it seems, the dry old planet we once believed (1) ．Astronauts who a

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 of 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） 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    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．occasions       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．between         C．for  D．with

12．A．energetic        B．great       C．heavy      D．powerful

13．A．there’s    B．there’re  C．here’s     D．here’re

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         D．before

19．A．Not         B．No  C．Nor        D．Never

20．A．probably         B．perhaps  C．supposed        D．although

试题答案

1.C   2.A  3.B  4.A  5.C  6.D  7.D  8.C  9.B  10.A  11.D  12.D  13.A  14.C  15.B  16.A  17.D  18.B  19.B  20.D