Sure! Here are the answers to your questions:
Question 1:
Ellos a Silvia.
Answer: conocen
Question 2:
Teresa _información.
(You likely need a verb here; please provide options to choose from if available.)
Question 3:
El correo electrónico rápidamente _para enviar información.
Answer: sirve
Question 4:
What role do Hispanic organizations play on the campuses of the technology universities mentioned in the lesson?
Answer: They provide support to Hispanic and Latino students on campus.
Question 5:
What achievement did Álvarez accomplish with his son?
Answer: He published an article on subatomic particles.
If you can provide more context for Question 2, I'd be happy to help with that as well!