He is from a grand duchy.

Kobo is my best friend.

I'm looking forward to taking landscape photos with my new wide-angle lens.

He picked up the ray gun and fired it at the alien.

His most favorite food is sushi.

He went to a new school for changing school.

He learned about the structure of society in his civics class.

He is an expert in enzymology and has conducted many studies in that field.

He is an expert in enzymology and conducts many researches.

He was prescribed antidepressants by his doctor.