the man in blue?前面填什么?

题目

the man in blue?前面填什么?
the man in blue is his father<对his father提问>
____ ____the man in blue?

答案

who is
who一般对人提问
用who提问时
把原句谓语动词提前就行
不用变时态
如
My brother -was- a teacher with glasses.(对my brother提问）
Who -was- a teacher with glasses.