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There have been frequent railway accidents in China recently, and that is people are concern...

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Rail and motor  Motor and rail  Rail and rail  Water and rail  
run right into the city center  do not have departure wait  have now speed and convenience  arrives on time while planes do not  
government support  comfortable facilities  shorter distance  better competitiveness  
He thinks he has discovered a new possibility in the link between sun spots and the weather on the Earth.  He has great doubts about the theory that the sun' s frequent changes have an influenced on the Earth' s climate.  He has been recently informed by other scientists of the possibility that more sun spots will appear.  He does not think the causes of the sun spots will be fully revealed by scientists in the near future.  
frequent opening of hatches to permit entry of fresh air  regular checks of bilge levels  use of ear plugs to dampen engine noise  frequent flushing of the water spray system with fresh water"  
that  when  in which  for which  
the rail fare  that of the rail fare  those of the rail fare  which of the rail fare  
to make    made    having made    making  
official  fluent  native  frequent  
A common rail engine, conventional engines  A conventional engine, common rail engines  A marine diesel engine, most other engines  A two-stroke engine, four-stroke engines  
that    when    where    why  
happened; would not be    has happened; would not be    had happened; would not have been    has happened; will not be  
lie down and surrender  cooperate and complain  improve its own service  merge with the rail  
official    fluent    gradual    frequent  
in which  for which  which  when  
has completed    have completed    has been completed    have been completed  

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