短文改错。

The day before yesterday,I went to the bookstore where（which） is near our school to buy the reference.It was Saturday,so there had（were） many people.with a shop assistant's help,I quickly got the book.I was badly （really）in need.Iwas about to leave whule（when） I found someone trying to steal a man's money/nervous although I was,Itried to think of a way to help（加上him）.Suddenly,a good idea struck on me.I stopped on the man's foot deliberate（deliberately）.As expected,the man's scream gives（gave）,the thief a flight, who quickly walked out of the shop.After hear（hearing） my explanation the man smiled and showed（expressed） great gratitude to me. 括号里的是改的， 供参考。希望能帮到你。