英语选择 No one knows___the fight ___

Ahow;came about
B when;happens
C where;takes place
D why;was for
请详细说明为什么选A，错的选项该怎么改

英语选择 No one knows___the fight ___ 英语no one 和 none的区别 kno是什么意思 none 和 no one no one nobaody 区别 no one died No One Is There No one歌词 选择第2题：No one was surprised at _______the examination. nothing ,no one ,none ,no thing 用法?