Where is my canteen?

The water level of the river has suddenly risen.

This data is showing a significant change over time.

He solved the problem using numerals.

He went to Tokyo a few days ago.

Ah! I left something behind!

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

Please use the emergency exit in case of a fire.

He is learning an ancient secret art.

I think his behavior is completely lacking in common sense.