I will hold my birthday party on the tenth day of the month.

There is a test in two days.

He had been working overseas for an extended period of time.

The theory of spacetime is an important part of physics.

Mr. Mashiwa is my best friend.

Sakakima is my best friend.

Mr. Azama is my best friend.

He was a bit dimwitted, so I had to repeat the explanation several times.

I really think he's a dimwit.

The summer vacation ended in the blink of an eye.