Who do you guess the winner is?这句话语法对吗?

Are you the sort of person who is outgoing?这句话语法上对吗? Do you know A who is that man B who is the winner C who will do you know who the most famous person is in china 这句话对吗? who is the winner? who will be the winner?这句话对吗?有语法错误吗? who teach you math last year?这句话语法对吗 Persistance is what you need to do everything well.这句话语法对吗?w i'm the first prize's winner这句话对吗? Do you think who should get the job.这句话表达对吗?请指正! 请问Do you know the girl who he often talks to 这句话对吗? can you guess ( ) the man is 用who 还是whom Who is the winner?Why?(为什么)?