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Trees are one of the oldest living things on earth. They play a very important role for human's exi...

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old  older  oldest  the oldest  
the oldest country  the oldest countries     much older country  much older countries  
the oldest country  the oldest countries   much older country  much older countries  
Never I have seen    I haven't never seen    Never have I seen    I have seen never  
Never I have seen    I haven't never seen    Never have I seen    I have seen never  
the oldest    an oldest one    the old    an old one  
A. older; city    the older; city    oldest; cities    the oldest; cities  
old    older    oldest    the oldest  
the oldest country    much older country    the oldest countries    oldest countries  
A.older city   oldest city   older cities   oldest cities  
old     older     oldest     the oldest  
A. older; city    the older; cities    the oldest; city    the oldest; cities  
oldest; older    the oldest; older    the oldest; elder    the older; elder  
oldest;older   the oldest;older   the oldest;elder   the older;elder  
old  older  Oldest  the oldest  
old  older  oldest  the oldest  
old  the older  oldest  the oldest  
elder…The oldest  older…The oldest  elder…The old one  older…The oldest  
old    older    oldest    the oldest  
A.older; city  the older; city   oldest; cities  the oldest; cities  

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