You should only address others with “tu” when they are your age or younger. You use usted with people older than you like a grandparent or some random older person on the street you might run into.
Answer:
1. Paola quiere una revista de ciclismo (Paola wants a cycling magazine)
2. Porque Miguel no entendió a la primera (Because Miguel didnt understand at first)
3. No, pero le dice donde conseguirlas (No, but he told her where to get it)
4. En la tienda de deportes (at sports shop)
El Pais mas puequeno es El Salvador (yo soy de ahi jaja)
Cuba es la isla con mayor superficie del Caribe, con 109.884 kilómetros cuadrados en total.
The dialogue translates to:
<span>Ignacio: I went on vacation for 20 days
Marta: When did your vacation started?
Ignacio: _______.
Last week
The day before yesterday
Last night
Last month
Therefore the answer is el mes pasado (last month) </span>