拜托帮我把这几句句子改成被动语态.不难的!

题目

拜托帮我把这几句句子改成被动语态.不难的!
1.they told me you had been of pairs.
2.someone gave the little girl a pair of red shoes for christmas
3The white Americans in the north made laws to sat the blacks free from the whites.
4.most of the masters thought of their slaves as animals that could be bought and sold.

答案

I was told you had been of pairs.
The little girl was given a pari of red shoes for christmas
Laws were made by the white Americans in the north to sat the blacks free from the whites.
The slaves were thought by most of the masters as animals that could be bought and sold