定语从句翻译句子~急

他是一名伟大的作家全世界大多数年轻人都读他的书。
He is a great writer that most of young people reads his book in the world.
你认识正和老师谈话的那个男孩嘛？
do you know the boy who is talking to teacher now?
他是我所见过的最小心的男孩。
he is the boy who's the most carefully one.
昨天在这里的是一个科学家
Yesterday who was here is a scientist

He is a great writer that many young people all over the world read his books.
Do you know the boy whom the teacher talking to?
He is the most careful boy that I have seen.
The man who came here yesterday is a scientist.

1 he is great writer world majority young people reads his book.
2 you knew just and teacher talks that boy?
3 he is I have seen the most careful boy. what
4 yesterday in here is a scientist

He is a great writer whose books are read by most youth in the world.
Do you know the boy who is talking to the teacher?
He is the most careful boy I have ever seen.
The man who was here yesterday