英文语法题! !急! !还是50分!

英文语法题! !急! !还是50分!
A secondery 2 schoolboy arrested last night after
broken into his school.He was trying to steal the
examination papers.
The school cretaker was making his rounds about
9:30p.m. He was noticed some light inside the teachers'
office.As he approached the office,he listened some
voices and saw two boys jump out the window and
running away.
He called the police immediately.At his surprise,he
found another boy was holding the examination ppes set his teachers
for the coming final examination.He was very frighten
though he was discovered by the watchman.
The boy told the police that his school results has
been very poor.Therefore,he broke at the school to
stealing the examination papers.He thought this was the
only way he can get better marks.
The school principle was disappointed that the boy
was such silly.
The boy was unwilling to name the another two boys
which had gone with him.
一样,这里每一个line都有一个拼字or文法or漏字上的错误,请大家帮忙找出来,感激不尽!