Select don't OR doesn't. My brother don't / doesn't study for his test.
I don't / doesn't wash the dishes.
My mother don't / doesn't fix the sink.
You don't / doesn't go to the park.
She don't / doesn't have black hair.
They don't / doesn't hurry to class.
We don't / doesn't wish to be adults.
My sister don't / doesn't teach guitar classes.