Go dti is not ok here?
It should be, yes.
Shouldn' t "go dti" be accepted instead of "chuig" or are they used in different ways?
Téann sé chuig an ospidéal
Téann sé go dtí an t-ospidéal
It is somewhere discouraging that an exercise which has been grammatically correctly rendered, is considered as a mistake. In this case " go dtí " and " chuig"
I thought chuig was for events rather than for places