2．Are we humans alone in space？Scientists have been working on this question for a long time．And recently，new （16）A offer more hope that some form of life was on Mars in the past and perhaps is still there（17）B．
According to a new report in the book Science，the Mars Explorer Curiosity has found more methane（甲烷） in （18）D air．It might suggest the possibility of life．
During the last 20months，Curiosity has found methane many times，and four of them，it tested at a level 10times （19）C than usual．"It's a great increase，"said Christopher Webster，the lead scientist．
This new finding has made a big change．In September 2013，Curiosity found almost（20）B sign of methane on Mars．Just weeks later，however，Curiosity （21）A the gas．
If there's methane in Mars'air，where is it coming from？Scientists aren't sure．Methane is also found in Earth's air and comes from animal and plant life，as well as from the environment（22）D．
"There are many（23）A sources（来源），such as actions between water and rock，"guessed Sushil，a scientist of the Curiosity team．
Also，for the first time，Curiosity found some other organisms（有机物） in the rocks of Mars．Organisms are thought to be the necessary things to form life．Scientists aren't sure where these organisms come from．They could have formed on Mars （24）D landed on Mars by meteorites．
For the next three years，Curiosity will （25）C looking for more organisms in rocks and exploring Mars．There is still a long way to go!
According to a new report in the book Science，the Mars Explorer Curiosity has found more methane（甲烷） in （18）D air．It might suggest the possibility of life．
During the last 20months，Curiosity has found methane many times，and four of them，it tested at a level 10times （19）C than usual．"It's a great increase，"said Christopher Webster，the lead scientist．
This new finding has made a big change．In September 2013，Curiosity found almost（20）B sign of methane on Mars．Just weeks later，however，Curiosity （21）A the gas．
If there's methane in Mars'air，where is it coming from？Scientists aren't sure．Methane is also found in Earth's air and comes from animal and plant life，as well as from the environment（22）D．
"There are many（23）A sources（来源），such as actions between water and rock，"guessed Sushil，a scientist of the Curiosity team．
Also，for the first time，Curiosity found some other organisms（有机物） in the rocks of Mars．Organisms are thought to be the necessary things to form life．Scientists aren't sure where these organisms come from．They could have formed on Mars （24）D landed on Mars by meteorites．
For the next three years，Curiosity will （25）C looking for more organisms in rocks and exploring Mars．There is still a long way to go!
| 16．A．discoveries | B．inventions | C．books | D．magazines |
| 17．A．in time | B．at present | C．at once | D．in future |
| 18．A．Earth's | B．Sun's | C．Moon's | D．Mars' |
| 19．A．high | B．low | C．higher | D．lower |
| 20．A．all | B．no | C．every | D．much |
| 21．A．picked up | B．put up | C．gave up | D．opened up |
| 22．A．himself | B．themselves | C．herself | D．itself |
| 23．A．possible | B．necessary | C．certain | D．important |
| 24．A．and | B．but | C．so | D．or |
| 25．A．stop | B．practice | C．keep | D．remember． |
April will bring a new product-the Apple Watch-into the market．Last week，the watch was firstly introduced by Tim Cook，Apple's CEO．The price of the watch will differ from﹩349to﹩1，099，depending on its size，strap and whether it is a sports or regular version．
16．Literature is a word used to describe written as well as spoken material．Generally speaking，it is often used to describe anything from creative imagination，including works of poetry，drama and fiction．
Then why read literature，since it is often imaginary and seems unconnected with real life？
A lot of us read literature for enjoyment and relaxation．It's always pleasant to read some interesting books in our spare time．In a modern life full of stress，it is our common wish to read some imaginary works and look for relaxation from the stress in life．
Reading literature is more than fun，it also allows us to get knowledge．As a general rule，literature represents a language of a people，and it often helps us know more about the traditions，attitudes and values of the age in which it was written．
Sometimes literature can even offer us new，creative ways to have a better understanding of the world．It introduces us to new worlds of experiences．We enjoy the comedy and the tragedy of poems，stories and plays，and we may even grow through our literary journey with books．At last we may discover meaning in literature by looking at what the writer says and how he or she says it．In some ways，we explore the human condition and study the way they think and feel the way they feel．Literature helps us think clearly and encourages us to open minds．
So we can certainly say literature is of great importance to us．Why not get going with one poem，drama or fiction at once？
Then why read literature，since it is often imaginary and seems unconnected with real life？
A lot of us read literature for enjoyment and relaxation．It's always pleasant to read some interesting books in our spare time．In a modern life full of stress，it is our common wish to read some imaginary works and look for relaxation from the stress in life．
Reading literature is more than fun，it also allows us to get knowledge．As a general rule，literature represents a language of a people，and it often helps us know more about the traditions，attitudes and values of the age in which it was written．
Sometimes literature can even offer us new，creative ways to have a better understanding of the world．It introduces us to new worlds of experiences．We enjoy the comedy and the tragedy of poems，stories and plays，and we may even grow through our literary journey with books．At last we may discover meaning in literature by looking at what the writer says and how he or she says it．In some ways，we explore the human condition and study the way they think and feel the way they feel．Literature helps us think clearly and encourages us to open minds．
So we can certainly say literature is of great importance to us．Why not get going with one poem，drama or fiction at once？
| Topic | （56）Why should we read literature？ |
| Explanation | It（57）describes anything from creative imagination． |
| Types | It（58）includes poems，drama，fiction and so on． |
| （59）Reasons to read literature | ◇To get enjoyment and relaxation to forget stress in （60）Life． ◇To get （61）knowledge to make us learn about traditions，attitudes and values of the age in which it was written． ◇To offer people ways to（62）understand better about the world，to enjoy （63）works of literary，to grow through the literary journey，to discover meaning in literature，and even explore how humans think and feel． ◇To help us think（64）clearly and make us open our minds． |
| Suggestion | Literature is（65）important to us，so we'd better read literature at once． |
14．The teacher stood before his class and was going to hand out the final exam papers．"I know how （16）D you have all worked to prepare for this test，"he said．"And because I know you can do it well，I am willing to （17）A a B to anyone who would prefer not to take the test．"
Many students jumped up to （18）C the teacher and left the classroom．The teacher looked at the students left and said，"Does anyone else want to get a B？This is your last（19）A．"Two more students decided to go．
Seven students （20）B．The teacher then began to hand out the （21）C．There were only three sentences typed on the paper，"Congratulations!You have just （22）D an A in this class．Keep believing in yourself．"
I never had a teacher like that，（23）B I think it is a test that any teacher could and should give．Students who are not（24）A in what they have learned are B students at best（充其量）．
The same is（25）C in real life．The A students are those who believe in what they are doing because they have （26）C both successes and failures．They have learned life's lessons，either from normal education or from events in their lives，and have become （27）D people．
Scientists say that by the age of eight，80% of what we believe about（28）C has already been formed．You are a big kid now，and you（29）B that you have some limits．However，there is （30）D you can't do or learn or be．
Sir Edmund Hillary，the first person to reach the summit of Mount Everest said，"It's not the mountain we face and conquer but ourselves．"
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Many students jumped up to （18）C the teacher and left the classroom．The teacher looked at the students left and said，"Does anyone else want to get a B？This is your last（19）A．"Two more students decided to go．
Seven students （20）B．The teacher then began to hand out the （21）C．There were only three sentences typed on the paper，"Congratulations!You have just （22）D an A in this class．Keep believing in yourself．"
I never had a teacher like that，（23）B I think it is a test that any teacher could and should give．Students who are not（24）A in what they have learned are B students at best（充其量）．
The same is（25）C in real life．The A students are those who believe in what they are doing because they have （26）C both successes and failures．They have learned life's lessons，either from normal education or from events in their lives，and have become （27）D people．
Scientists say that by the age of eight，80% of what we believe about（28）C has already been formed．You are a big kid now，and you（29）B that you have some limits．However，there is （30）D you can't do or learn or be．
Sir Edmund Hillary，the first person to reach the summit of Mount Everest said，"It's not the mountain we face and conquer but ourselves．"
| 16．A．luckily | B．terribly | C．quietly | D．hard |
| 17．A．offer | B．pass | C．show | D．take |
| 18．A．praise | B．fight | C．thank | D．attack |
| 19．A．chance | B．trouble | C．test | D．idea |
| 20．A．left | B．remained | C．came | D．arrived |
| 21．A．results | B．presents | C．papers | D．books |
| 22．A．given | B．sent | C．discovered | D．received |
| 23．A．and | B．but | C．or | D．so |
| 24．A．confident | B．strict | C．interested | D．pleased |
| 25．A．unusual | B．impossible | C．true | D．special |
| 26．A．broken out | B．dreamed of | C．learned from | D．cared about |
| 27．A．ruder | B．cuter | C．worse | D．better |
| 28．A．them | B．you | C．ourselves | D．myself |
| 29．A．decide | B．realize | C．forget | D．imagine |
| 30．A．something | B．anything | C．everything | D．nothing． |