It is the only class of its kind in the area.

These are the only classes in which students either pass or fail.

These are the only classes she will give during her stay.

It would have made them the only class of people forced to be tested under state law.

They are also the only class of women permitted to read.

They were the only class that did not have a clear place in the modern world.

The only class to have its own room is kindergarten.

The only class with a higher enrollment, he says, is a religion course required for graduation.

In fact, the only class of events which all authors include is crowds.

Despite being the only female class winner, possibly her best known moment came in 1991.