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spends; walking takes; to walk spends; to walk takes; walking
half an hour a hour two hour half a hour
one and a half hour one hours and a half hours one hours and a half one and a half hours
is building； takes is being built； will take is built； will take is being built； takes
is building； takes is being built； will take is built； will take is being built； takes
thirteenyearold thirteenyearsold thirteen year old thirteen years old
half an hour a hour
two hour half a hour
costs; spends spends; take takes; costs spends; takes
costs; spends spends; take takes; costs spends; takes
is building； takes is being built； will take is built； will take is being built； takes
two and a half hour two and a half hours two hour and a half two hour and half an hour
is building; takes is being built; will take is built; will take is being built; takes
two year and a half two and a half year two years and half two and a half years
takes, to do takes, doing took, to do took, doing
to arrive in; on to get; on reach ; by get to ;by
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