The plan：turn Mars into a blue world with streams and green fields ,and then fill it with creatures（生物）from the earth.
This idea may sound like something from a science fiction（科幻小说）,but it is actually being taken seriously by many researchers .This suggested future for the “red planet” will be the main topic for discussion at an international conference hosted by NASA（美国宇航局）this week. Leading researchers as well as science fiction writers will attend the event .It comes as NASA is preparing a multibillion-dollar Mars research programme.
“Turning Mars into a little earth has long been a topic in science fiction,” said Dr Michael Meyer, NASA's senior scientist for astrobiology（太空生物学）.“Now ,with scientists exploring the reality ,we can ask what the real possibilities of changing Mars are.”
Most scientists agree that Mars could be turned into a little earth ,although much time and money would be needed to achieve this goal.
“We are destroying our own world at an unbelievable speed and now we are talking about ruining another planet,”said Paul Morin ,of the Institute of Astronomy ,Cambridge ,UK.
Over the past months ,scientists have become increasingly confident they will find Martian life forms .Europe and America's robot explorers have found proof that water ,mixed with soil ,exists in large amounts on the planet.
1.Those who agree to turn Mars into a little earth_______.
A.are short of confidence
B.will gain the support of NASA
C.realize their dream needs lots of time and money
D.are asking for advice on how to carry it out
2.The author took Paul Morin as an example to show he_______.
A.is for the idea of exploring Mars
B.is active in saving the earth
C.is against the idea of turning Mars into a little earth
D.cares about environmental protection
3.Science fiction writers will attend the international conference to be held by NASA to_______.
A.inspire their interests
B.set more details for them to write with
C.join in the discussion
D.collect money for Mars research programme
4.Turning Mars into a little earth_______.
A.is no longer a topic of science fiction stories
B.is now under way
C.is a project whose possibility is being explored
D.is against human interests