Respuesta :

Answer:

The teacher tells her students, who promise they will study quietly for three hours, that she won't give extra assignments.

Explanation:

According to the rest of the sentence, grammatically, "will study" is the correct answer because the teacher tells her students that she won't give extra assignmentes, and the students promise they will be quiet for that reason, given the context, they would probably be studying.

The teacher told her students that she wouldn't give any extra assignments if they would study quietly for three hours.

What did the students promise to do?

The students made a promise to their teacher that they would study silently for three hours.

In return, the teacher promised to not give them any extra assignments because the students would then have learned a lot from the studying.

Find out more on making promises at https://brainly.com/question/13686287.