They (girls) study at the library every day.

The prepositional case plays an important role in English grammar.

Prefix notation is a notation where the operator comes before the operands.

The issue of the previa vessel is a very important issue in obstetrics.

I put the book on the table.

I go to drink coffee in front of the station every day.

I used to live in Tokyo before.

I remember talking to him before.

Don't take his joke seriously.

I am planning to have a physical examination next week.