Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
G, A,B, |: C2 EA GC | B,2 DG Bd | b2 aB f2 | eG c2 ED | C2 EA GC | B,2 DG Bd | 
 gb ag fB |1 c2 z G, A,B, :|2 c2"_fine" z2 z2 |: Bd fa gb | (c'c eg) .c.a | 
 (fB df) Bb | ac eg c2 | Bd fc' ba | ag ee' d'c' | ba fb aB | c2 z2 z2 :|  
X:1
L:1/8
M:3/4
K:C
 G, A,B, |:"C" C2 EA GC |"G7" B,2 DG Bd | b2 aB f2 |"C" eG c2 ED | C2 EA GC |"G7" B,2 DG Bd | 
 gb ag fB |1"C" c2 z G, A,B, :|2"C" c2"_fine" z2 z2 |:"G7" Bd fa gb |"C" (c'c eg) .c.a | 
"G7" (fB df) Bb |"C" ac eg c2 |"G7" Bd fc' ba |"C" ag ee' d'c' |"G7" ba fb aB |"C" c2 z2 z2 :|  