英语短文改错。

一楼少改了一处错误，总共十处！更正在括号处注明！

Last Sunday afternoon, I went to the zoo with Lily.There (was改成were) lots of people there. I found a girl (cry改成crying) in the zoo. She was lost and she (can’t改成couldn't) find her mother. We decided to help her. I (try改成tired) my best (加入to) find the broadcasting station in the zoo. (On改成At) the same time Lily played with her and looked after her (careful改成carefully) there. The little girl stopped crying and played with Lily. At last (his改成her) mother came. That made me feel very (happily改成happy). I thought I really did a good thing. If everyone helps (去掉with) each other, the world will become more beautiful.

There was （were）lots of people
cry--crying
can't--couldn't
try---tried
find----to find
On the same time---at the same time
careful---carefully
his mother---her mother
happily---happy

第2行 can't 改为 could't . find 前面加to.
第3行 on 改为at careful 改为carefully
第5行 happily 改为happy