Dance of the SPF: Detailed excercises - slow tempo, played by midi so you can hear the tuning.    I RECOMMEND highlighting these measures in the score; the 8-12 and 16-20 repeat a number of times without a pause, if the measures are somehow highlighted or marked you can keep repeating easily.  the m.21-end recording is only once.  It is some new material at the beginning, then the rest is material that came before.  Once you know the 8-12, and the 16-20, the rest will be easy.
ALTOs: Pay attention to Bass start note, to help you get your start note.
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Alto
m.8-12 (you enter at 9)
​m.16-20 (*)
m.21-end

*1st 3 notes corrected)

Soprano
​m.8-12 ​(you enter at 9)
​m.16-20 (you enter at 17)
m.21-end (you enter in m. 22)
HELPFUL: when you sing the "doodle oodle oo"s,  make a rather closed  "oo" shape with your your lips  and keep them still  just move your tongue.