Las válvulas distribuidoras pueden clasificarse en dos grupos means "The distributor valves can be classified into two groups"
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.
Answer: A
Ruego que ella busque un artista de grafiti.
Explanation:
I just took this test in spanish and it is 100% A.