Adam ate an apple
An Antelope Ate an Apple?
Alliteration
Zooming zebras zigzagging.
In Iceland insulation is invariably installed in igloos.
Harry has hurt his hand.
"Can cats catch crafty cockroaches".
Amanda and Anthony are against allowing abortions.
Lucy Loved Licking Lollipops.
Elderly Elephants Eagerly Eat Eggs
"Nick never needs nine new notebooks."
Cat Cannot Control Cam's Camera(:
only does not begin with an a there for there can be no sentence with only starting with an a because only starts with a o.