carol|caroling|carols

婚礼上，歌手演唱了一首动人的颂歌。

At the wedding, the singer performed a touching ___carol.

每年圣诞节前夕，孩子们都会挨家挨户去唱圣诞颂歌。

Every Christmas Eve, the children go ___caroling from door to door.

孩子们在圣诞节期间快乐地唱着颂歌。

The children sing ___carols joyfully during the Christmas season.