With opera, it is important to study the lyrics before listening to the music. This scene contains three primary sections. It begins with
1) a song (aria) sung by Donna Elvira (with some side comments by Don Giovanni and Leporello); continues with
2) a dialogue (recitative) sung by all three characters; and concludes with
3) a song (aria) sung by Leporello.
Here are the lyrics:

Let's start with Donna Elvira's aria. Fill in the blank in the statement below.

Before Don Giovanni and Leporello make side comments to one another, Donna Elvira sings -stanza(s) of lyrics (individual paragraphs)