Here are the completed sentences with the simple past form of the verbs:
The car stopped in front of the house.
Sam was your brother.
I preferred the blue T-shirt to the red.
Fanny sang all her hits at the concert.
Ana did her homework yesterday.
They stayed in a very nice hotel.
We watched the baseball game at Alberto's house.
Elena gave me a birthday.
Please note that for sentence 8, it seems you may need a word such as "gift" or "present" to complete the thought.