Answer:
The correct words, that fills the gaps are: ritornello; episodes; violin; sonnet;
Explanation:
The first movement of this concert puts the first two stanzas of the sonnet corresponding to "La Primavera" into sounds. The music makes very clear references to the song of the birds, to the murmur of the fountains and to the thunder and lightning.
The initial Ritornello (in My major) is in the form of aabb binary period, with a first semi-period (a) of 3 bars and a semi-finished period, and a second half-period (b) of 3.5 bars and a perfect cadence finish. This structure is not, by far, the most common in vivaldian rivels, which usually make use of fortspinnung type structures. Strikingly, phrase (a) will not appear again after the first ritornello, but will be (b) the segment used as a chorus during the rest of the movement.
