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Man has been to the moon. It has been the first step towards future exploration in spacE. When comp...

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will be building    will be built    has been building   has been built  
man has been  man is  will man be  has man been  
No one    Nobody    None    Anybody  
has it    hasn’t it    doesn’t it    isn’t it  
man has been   man is   has man been   will be man  
is visited    will be visited    was visited    has been visited  
Venus  Jupiter  Earth  Mars  
the government has stopped giving public institutions as much financial support as it used to  America has always been encouraging young people to go to college  many public institutions have replaced private ones  the government only finances such researches as that or placing man on the moon  
man has been  man is  has man been  will be man  
that has been    what have been    which has been    that have been  
carrying passengers to planets  acting as stop- over points  refueling spacecraft  providing supply of air, food and water  
that  which  whether  what  
is visited    will be visited    has been visited    was visited  
man has been    man is    has man been    will man be  
There will be no place the same as our Earth.  There will be many places, better than our Earth.  There will be some planets which may be suitable for our human being to live.  There will be a planet for man to be used as home in the near future.  
faster and lighter  more convenient and comfortable  bigger and lighter  quicker and larger  

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