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When on holidays, the railways put on _______trains to make people’s travel more convenient.

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regular    special    particular    Unusual  
which  whose   when  where  
which    that    when    whether  
are not decided    has decided    is not being decided    has not been decided  
which    whose    when    that  
when, Not I    when, Not really    that, Not me    that, Yes  
when; go    where; went    that; go    which; went  
invited    encouraged    allowed    forced  
special  regular  particular  unusual  
which    whose    when    where  
that we enjoyed    when we had    when we spent    which we had  
days  occasions  cases  holidays  
special   regular   particular   unusual  
and  that  when  which  

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