3.27Do the same in D minor

D natural minor:

D E F G A B♭ C D

The dominant built naturally would be:

Am

But raise degree 7:

C → C♯

D harmonic minor:

D E F G A B♭ C♯ D

Now V becomes:

A major / A7

So:

Dm → Gm → A7 → Dm

Play it.

Again:

C♯ → D

creates the leading-tone pull.