Переделать в passive, надо) 1. they have made a lot of changes in the area in the last five years. 2. we will discuss this subject in the next meeting. 3. they serve breakfast from 7: 00 am.

A lot of changes had made by they in the area in the last five years.
This subject would discuss by us in the next meeting.
Breakfast Was served by them from 7:00 a.m.