1. Saber o conocer?

Question

Ellos _______ a Silvia.
A) conozco
B) sabemos
C) sabe
D) conocen ***

3. El correo electrónico _______ para enviar información rápidamente.
A) sirve ***
B) sirvo
C) servimos
D) sirves

4. What role do Hispanic organizations play on the campuses of the technology universities mentioned in the lesson?
A) They provide support to Hispanic and Latino students on campus. ***
B) They offer housing to Hispanic and Latino students on campus.
C) They offer separate classes to Hispanic and Latino students on campus.
D) They provide English classes for Hispanic and Latino students on campus

5. What achievement did Álvarez accomplish with his son?
A) He developed a method to detonate the atomic bomb. ***
B) He founded a technological university in Hawaii.
C) He published an article on subatomic particles.
D) He developed a theory on the extinction of dinosaurs.

Answer 1

First two are right, but I cannot comment on the last two.

Answer 2

thank you @PsyDAG

Answer 3

Number 2 is C and the rest are correct except 5. Which is D