JAMB - English Language (2007 - No. 69)
There's a door at either end of the building?
The building has two ends and two doors
The building has two ends, but only one door
The building has two ends, but I do not know which of the two has a door
The building has many ending each and for all
Forklaring
Either as used before the first of two given alternatives. When it is used as a determiner, it refers to both choices or possibilities
This means that there are two alternatives. At each end of the building, there is a door.
Either is used only when there are two persons or things. The statement can be interpreted as
''There are two ends in the building, and each of the ends has a door.