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（閃耀） 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．a(chǎn)re going to be	C．has been	D．have been
42．A．yet	B．a(chǎn)lready	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，科學(xué)家做了很多研究但是還是有很多未解之謎．科學(xué)家認(rèn)為地球上存在生命已經(jīng)很多年了，至今還沒有在其他星球上發(fā)現(xiàn)生命．一共有八顆行星圍著地球轉(zhuǎn)，地球只是其中的一個．地球上有很多生命，還有水和空氣．與其他星球相比，地球不是太熱也不是太冷，其他七顆行星都沒有地球一樣的環(huán)境．太陽和圍繞著它的行星被稱為太陽系．太陽系只是銀行系中的一小部分．科學(xué)家們發(fā)現(xiàn)了很多其他的星系，它們的光到達(dá)我們這兒花費了很多年．宇宙究竟有多大呢，這是難以想象的．科學(xué)家們發(fā)射了宇宙飛船去探索火星，甚至去探索太陽系外的領(lǐng)域．但是對于宇宙，仍然有很多未解之謎．

解答 41：C  根據(jù)"for many years"可知，此處時態(tài)為現(xiàn)在完成時，因主語"life"為單數(shù)，所以此處應(yīng)該為C has been
42：A  根據(jù)"haven't found"可知此處為否定表示還沒發(fā)現(xiàn)，所以此處應(yīng)該用表示否定的yet
43：C  　這句話的句意為"地球不是太熱也不是太冷．"，所以此處應(yīng)該為too hot，答案為C
44：D　根據(jù)"larger"可知，此處為比較級，在四個選項中只有much可以修飾比較級，故答案為D
45：C　此處考查數(shù)的表達(dá)．AB中形式不對；billions of  數(shù)以億計的，billion要加s，故答案為C
46：A  根據(jù)"Their light has to travel for many years to reach us"客戶，此處強調(diào)宇宙非常大，how far  有多大，故答案為A
47：B   此處考查不定式，此處應(yīng)該用不定式"to take photos"表示目的
48：D  根據(jù)"even"和"outside"可知，此處表示去比火星更遠(yuǎn)的地方，火星在太陽系，所以答案為D
49：B  enough修飾形容詞時位于其后，根據(jù)上下文可知此處應(yīng)為"足夠遠(yuǎn)"，故答案為B
50：A  此處意為"宇宙中有這么多的行星"，用with表示伴隨，意為有，答案為A

點評 做這道題時要先通讀全文，弄清短文大意，然后根據(jù)語境及上下文選出正確答案，最后帶入文中檢查．