what is that boy?He is my friend .哪个错了

问题描述:

what is that boy?He is my friend .哪个错了
where are the magazines? It is on the table。 哪个错了

what 改为 who
因为what 是对职业的提问 what is that boy?意思是 "那个男孩是干什么的"
it is 改为 they are 因为 magzines 是复数 所以 主语应该用 they