Christmas Carol

My host mother is organizing Christmas Carol Service for children, and they had a practice for it in this afternoon. So I joined in them and sang some Christmas Carol together. It really succeed, all the children enjoyed it, and I could have a nice time as well. However I couldn't understand what they said. They spoke very quickly and unclearly, I have to ask them to repeat again waht they said. Sometimes I felt that they were annoyed with repeating several times for me, their faces let me know about it obviously. I was very upset and anxious. I'm sure that my English is still terrible, it was a good occasion to know about it.