You need to practice the snapping and clapping and memorizing your parts.
Symphony Recording: 5-4-18symphony.m4a
Also here is the complete recordings for your parts:
The solos for Shenandoah will hopefully be posted by Sunday evening. If you would like a solo, you will need to come on Friday so that way I can listen to you sing whichever one that you would like. You can audition for all as well and I can place you wherever I feel that you would sing best.