All of these treks can be undertaken alone by experienced walkers or under the watchful eye of local guides.
Experienced trekkers can walk the treks alone or with local guides.
Experienced trekkers are not allowed to walk the treks alone.
Cubans would emigrate if it is possible.
The baseball player is sitting on the bench in the dugout.
Tommy remembered he had a rich great aunt
Sirs, sirs all around.
The baby is eating.
There was a hierarchical society.