He injured his leg in a traffic accident.

He is majoring in syntax at university.

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

Kobo is my best friend.

His most favorite food is sushi.

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.

He was prescribed an antidepressant.