I gain valuable knowledgrs of english in this collere.改病句

I gain valuable knowledgrs of english in this collere.改病句
还有I have several coats,but only one trousers.The new machinery are not very modern.Many a student have more than one book.Is there any police around?The good news are always in this program.There are give woman mayor in this country.the first two questions are rather difficult,but the rest is easy.求求你们啦 我现在急需.