根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。
根据短文内容，用所给单词的适当形式填空。 (每空一词）

you ,  be,  on,  a,  box

I have ________ aunt. Her name is Mary.
The _______  are red.  They are Tom’s(汤姆的).
My pen is blue, and _______  is black.
His friend Tom _______ in America now.
His hat is _________  his head.