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Lots of scientists are working hard     send astronauts to Mars one day. A.so that B.in order  C....

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lot of    a lot    a lots of    lots of  
lots  a lot  lots of  lot of  
park lot  park loting  parking lots  park lots  
lots of informations    many informations    lots of information    a few information  
If   Since    Unless    Though  
a lot  lot of  a lots of  lots of  
lot of  lots of  a lots of  a lot  
subject    object    attributive    predicative  
a lot of   a lots of   lots of   a lot  
a lot; /  lots of; /  /; a lot  /; lots of  
the; the    the; 不填    不填;the    不填;不填  
lots of rooms for shoppers to sit in.  lots of rest rooms for shoppers to use.  ample space for shoppers to move round.  lots of rooms where new varieties of goods are on display.  
there have been decreased returns in the research of fundamental science  there are too many important things for scientists to study  applied science and engineering take up too much time and energy  today’s scientists are not as intelligent as those in the past  
so that    in order    in order to    and  
is many    are lots of    are some    is lots of
  

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