使用that,which,who或whom填空.或者下列句子用that,which,who或whom填空

使用that,which,who或whom填空.或者下列句子用that,which,who或whom填空I have lost the watch-------my father gave me.The boy----is on the bike is Mike.The person------I was speaking to was my uncle.the bus----takes us to school often breaks downThe friends------they had come to the party.The books------are on my table belong to my brother.The book is very interesting.I'mreading the book.The book------------is very interesting.The books were very expensive.I bought the books.The books-----------were very expensive.The trees fell down.The trees were big.The trees----------fell down.The man is not here.You were talking to the man.The man---------------in not here.The teacher was standing at the front.We handed the papers to the teacher.The teacher------------------was standing at the front.The young man is a doctor.We just saw the young man.The young man--------is a doctor.