Ten miles ________________ a long day to walk.
Ten miles ________________ a long day to walk.
Explanation
A distance or amount, when considered as a single unit, is treated as a singular subject.
So, the verb will also be singular, i.e. 'is'.
A distance or amount, when considered as a single unit, is treated as a singular subject.
So, the verb will also be singular, i.e. 'is'.