Answer:
1. ¿Pues, quien sabe la respuesta?
Correct form of conocer
2. Ellos conocen a los profesores de ciencias.
3. El conoce a la nueva chica.
What school do you attend? - I attend Saints Monica
En what type of school do you attend public or private school? I study in a public school.
Yo hago mi tarea todos Los dias.
The conjugation is because it's "I". In Spanish when there is an "I"/ "yo", "o" usually is the proper form to use.