Answer:
Question 1: Yo conozce a mi profesora de historia ayer.
Question 2: Nosotros sabemos la verdad.
Question 3: Mi hermano conozco a una persona famosa el ano pasado.
Explanation:
Each of these are the past tense of the word at the end of the sentences.
The famous palace built by King Philip II in Madrid is 'El Escorial' in the town of San Lorenzo de El Escorial. It was built in the 16th century. It is the historical residence of the king of Spain, which is situated about 45 km from Madrid.