The use of fossil fuels is causing global warming.

This service is not free of charge.

We want to nurture this mutual love carefully.

If you pay with a credit card, a transaction fee will be charged.

Both of my parents are doctors.

Ryou is my best friend.

I had lunch with my colleague.

My dormitory is close to the school.

My university dormitory is very convenient.

The fee for the food at this restaurant is high.