铎是多音字吗:it happend once in the blue moon

it happend once in the blue moon 用it happend once in the blue moon 编对话 how it happend Don't cry because it is over,smile because it happend.... once day you will see me ,but it is also in your dream in歌词 once in a lifetime once in a lifetime We have it in December but we don't have it in any other months.It is___ We have it in December but we don't have it in any other months.It is___ We have it in December but we don't have it in any other months.It is___