Create chord progressions that enrich the harmonic structure of the provided musical piece.
|: z G F E | D2 C2 | C D E C | B,2 A,2 | z B, C D | B, A, A,2- | A, B, C D | 
 (A, G,) G,2 | z G F E | D2 C2 | C D E C |{C} B,2 A,2 | z F E D | G E D C | 
 D3"^rit..." E | D2{ED} C2 |] z !fermata!c !fermata!c !fermata!B | (B G) G2 | z B B A | 
{A} F4 | z B B A |{A} F2 F2 | z D E F | G4 | z2 z G | _A2 A2 | z F c3/2 _A/ | 
 G2 G2 | z E D C | G4 | z E{DE} D3/2 B,/ | C4 :| |33 z E D C | G4 | 
 z G [eG]3/2 [dF]/ | [cE]4 |]  
X:1
L:1/4
M:4/4
K:C
|:"C" z G F E | D2 C2 | C D E C |"Dm" B,2 A,2 | z B, C D |"G7" B, A, A,2- | A, B, C D | 
"C" (A, G,) G,2 |"C" z G F E | D2 C2 | C D E C |"Dm"{C} B,2 A,2 | z F E D |"C" G E D C | 
"G7" D3"^rit..." E |"C" D2{ED} C2 |] z !fermata!c !fermata!c !fermata!B |"C" (B G) G2 | z B B A | 
"Dm"{A} F4 | z B B A |"Dm"{A} F2 F2 |"G7" z D E F |"C" G4 | z2 z G |"Fm" _A2 A2 | z F c3/2 _A/ | 
"C" G2 G2 | z E D C |"G7" G4 | z E{DE} D3/2 B,/ |"C" C4 :| |33 z E D C |"G7" G4 | 
 z G [eG]3/2 [dF]/ |"C" [cE]4 |]  