They (referring to women or girls) are my best friends.

He bought all the new comics in bulk, like an adult.

He bought all the new comics in bulk.

He is still a child, so it's difficult for him to understand the affairs of adults.

He is a very shy person in real life.

After the earthquake, we were forced to live in evacuation shelters.

His standard of living has improved significantly.

My cost of living is increasing every month.

He values his private life.

Studying the life cycle of this insect is very interesting.