In each exercise, the soprano and bass notes either imply specific chords, or the musical context does.
The first exercise for example:
- Looking at the final two notes, D and F, suggests either a Bb major chord or a D minor chord.
- Given the key signature of one flat (either F major or D minor), we can conclude the final chord will be D minor.
- The preceding chord has A and E given, which could be A major or A minor. Since A major is the dominant chord of D minor, we can conclude A major as the correct chord.
- After repeating this process for the other chords, it just remains to fill out the chords in the alto and tenor using the voice-leading rules that were, presumably, taught in earlier classes.