Answer:
1) usted
Explanation:
usted is formal, reserved for people you don't know and/or for elders. Since your aunt is most likely older than you (I say most likely since i'm actually an exception :/ ) usted will be the pronoun that you use.
Estas ropas son bonitas, pero aquellas no son muy buenas
Answer B) Comprar
Necesitamos comprar el libro para la clase de historia.
We need to buy the book for the history class.
Explanation : comprar means to buy something.
Answer:
1. The first would be yesterday, I would fish with my friends in the lake, number 2. It would be Eduardo and Diana make a machine, number 3. During my vacations, I will practice a lot of Spanish, number 4. Jorge will play the piano at last night's dinner, number 5. Andrea take the clothes out of your closet on the 6th last month I pay the rent for my apartment on the 7th I organize a party for my brother on the 8th the movie at the cinema will start an hour late.