An irrational number is a number that cannot be expressed as a fraction.

He imposed an unreasonable demand on me.

I think this game is an impossible game.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

We respect Japanese culture.

We are going on a trip tomorrow.

When I first met her, I introduced myself saying, 'I am Japanese.'