sight singing practice in C major

Today's lesson is sight singing practice with "You Are My Sunshine".  It is in the key of C major and notated in the treble (G) clef in 4/4 time.  If you tried to notate it yourself, you may have run into a problem in the first phrase.  That is because there is a note in the melody that is not in the C major scale.  This is called an accidental.  On the words "my only sunshine" the E becomes E flat and then goes back to E natural.