I spend these two holidays with my grandparents and cousins.
Explanation:
I want to spend this weekend with my grandparents and cousins that lives in another city. By reaching there I will go to the zoo and other recreational parks there with my cousins, uncle and parents. I will going to play cricket with my cousins and play video games as well. I will experience so much fun with my family and cousins in these two holidays.
In a sentence, the words <em>down the stairs </em>would be a A. prepositional phrase, since it begins with the word <em>down, </em>which is a preposition.