Members of Juan Carlos’s family have strong preferences for certain colors. Use del, de la, de los, or de las to indicate to whom each of the objects belong.

1one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.2 this being so, my trip demanded that i leave my name and my identity at home.3 i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.4 with all this in mind i wrote to the head office of a great corporation which manufactures trucks.

Did you ever get the answers?

Example :
when you have one it's family,but when you have two it's families.