It depends on where you will live but the main companies are: Ameritech, MediaOne or TCI, Consumers Energy, and Board of Water and Light.
(It; depends; on where you will live) (you; will live; ) (the main companies; are; Ameritech, MediaOne or TCI, Consumers Energy, and Board of Water and Light)
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Ameritech, MediaOne or TCI, Consumers Energy, and Board of Water and Light