Apologies for the number of posts i'm putting up but the question here concerns whether quo (abl of qui) should be used in a purpose clause containing a comparative.
The Question is :
They are setting out at daybreak in order that they may make a longer march before night.
The answer key gives:
Prima luce proficiscuntur ut ante noctem iter longius faciant.
Given the comparative longius is used, should not quo be used ...