Hello, my brother is really important to me, growing up with him is fun and without him I would not be myself. I think that most of the people with siblings could agree. We have a lot of good memories together like...(вставь хорошие моменты с ним)
What book shall I buy for you?
she's wearing - present continuous
т.к. есть фраза - посмотри на Катю.
т.е. действие происходит в данный момент, и she wears не подходит, т.к. она носит его на на постоянке, а сейчас