Okay, I did get 75% (15 out of 20) going off the top of my head. I was wrong on #19, but I was right in my qualified "UNKNOWN" on #15. The problem there is that the wording is not what I'm used to (I have always seen/sung "opening to" where the quiz has "clearly as") plus I don't think of that hymn as a Christmas piece, let alone a carol.