Question

11．The universe is really mystical（神秘的）．Scientists have done lots of study about it but there is till much they haven't discovered．
Scientists think that there （41）Clife on the earth for many many years．However，we haven't found life on any other planets （42）A．
There are eighteen planets going around the sun．The earth is one of them．There are humans，animals，plants and many other kinds of life on the earth．There is water and air，too．And compared to the other planets，the earth is not too （43）Cor too cold．None of seven other planets has an environment like that of the earth．
The sun and its planets are called the solar system，and our solar system is a small part of a （44）Dlarger group of stars and planets，called the Galaxy or the Milky Way．There are （45）Cstars in the Galaxy，and our sun is only one of them．
Scientists have also discovered many other galaxies in the universe．Their light has to travel for many years to reach us．So （46）Ais the universe？it is impossible to imagine．
Scientists have sent spaceship to the planet Mars （47）Bphotos．they have even sent spaceships to travel outside （48）D．However，no spaceship has traveled （49）Bto reach other stars in our Galaxy．
When we see stars twinkling（闪耀） in the sky at night，we may think a lot：（50）Aso many stars in the universe，is there life out there in space？If there is life on other planets，what life will be like there？What transports do they use to travel？why don't they visit us？We do not know the answers…

41．A．is going to be	B．are going to be	C．has been	D．have been
42．A．yet	B．already	C．still	D．just
43．A．cool	B．warm	C．hot	D．wet
44．A．most	B．more	C．many	D．much
45．A.200 billions of	B.200 billion  of	C．billions of	D．billion of
46．A．how large	B．how far	C．how wide	D．how long
47．A．taking	B．to take	C．take	D．took
48．A．Mars	B．the sun	C．the earth	D．the solar  system
49．A．enough far	B．far enough	C．enough close	D．close enough
50．A．with	B．without	C．by	D．on．

Answer 1

分析 宇宙非常神秘，科学家做了很多研究但是还是有很多未解之谜．科学家认为地球上存在生命已经很多年了，至今还没有在其他星球上发现生命．一共有八颗行星围着地球转，地球只是其中的一个．地球上有很多生命，还有水和空气．与其他星球相比，地球不是太热也不是太冷，其他七颗行星都没有地球一样的环境．太阳和围绕着它的行星被称为太阳系．太阳系只是银行系中的一小部分．科学家们发现了很多其他的星系，它们的光到达我们这儿花费了很多年．宇宙究竟有多大呢，这是难以想象的．科学家们发射了宇宙飞船去探索火星，甚至去探索太阳系外的领域．但是对于宇宙，仍然有很多未解之谜．

解答 41：C  根据"for many years"可知，此处时态为现在完成时，因主语"life"为单数，所以此处应该为C has been
42：A  根据"haven't found"可知此处为否定表示还没发现，所以此处应该用表示否定的yet
43：C  　这句话的句意为"地球不是太热也不是太冷．"，所以此处应该为too hot，答案为C
44：D　根据"larger"可知，此处为比较级，在四个选项中只有much可以修饰比较级，故答案为D
45：C　此处考查数的表达．AB中形式不对；billions of  数以亿计的，billion要加s，故答案为C
46：A  根据"Their light has to travel for many years to reach us"客户，此处强调宇宙非常大，how far  有多大，故答案为A
47：B   此处考查不定式，此处应该用不定式"to take photos"表示目的
48：D  根据"even"和"outside"可知，此处表示去比火星更远的地方，火星在太阳系，所以答案为D
49：B  enough修饰形容词时位于其后，根据上下文可知此处应为"足够远"，故答案为B
50：A  此处意为"宇宙中有这么多的行星"，用with表示伴随，意为有，答案为A

点评 做这道题时要先通读全文，弄清短文大意，然后根据语境及上下文选出正确答案，最后带入文中检查．