My grandfather is being seen by a specialist in geriatric medicine.

He is a specialist in that field.

He decided to start his own business, waiting for the right opportunity.

He decided to watch the stars all night long.

After listening to her story, I cried in sympathy.

I had my friend get my forgotten item for me.

He majors in medicine.

My grandfather is healthy and living a long life.

The doctor used a light to examine my throat.

He was diagnosed with glycosuria.