As a dissonance, the seventh of any seventh chord requires resolution. Because of its descending passing-tone origin, the seventh always resolves down by step. In the tenor voice of Example 6, the seventh of the ii chord steps down to B in following the V chord.
Activity 7.6:
In this activity you will continue the “I - ii” progressions from the Activity 7.5 by adding a V chord. Exercise 7.6a: