15. They the institute five years ago.
(A) have entered
(B) entered
(C) had entered
16. Does the professor _ a lot of experience?
(A) has
Ο Ο Ο
(B) have
(C) had

Achemical reaction takes place in which energy is released a range of the reaction characteristics in order from start to finish

Ineed ,someone me on this and my other questions

Read this passage: byron and mitch are co-captains of the mathletes, their high school's academic team. they are backstage with the five other team members, preparing to compete in the state math quiz. byron sits on the floor with his eyes closed and his earbuds in, listening to classical jazz, which him focus his mind and energy. suddenly, he feels a presence beside him. he opens his eyes to see mitch staring at him. "mathletes! mathletes! " mitch chants loudly. mitch gives byron a thumbs-up and then proceeds to strut around like a peacock, high-fiving the other team members, as byron shuts his eyes again and does his best to refocus his mind which statement best summarizes the passage?