This guy is my old friend.

Due to the fire, black smoke was rising into the sky.

Market research is necessary before conducting a preliminary trial of the new product.

He can speak African American Vernacular English fluently.

Once you're ready, let's go!

I will take a plane from Narita International Airport.

The International System of Units is the standard measurement system used by scientists all over the world.

The International Phonetic Alphabet is an essential tool for linguistic research.

The International Atomic Energy Agency is an international organization that promotes the peaceful use of nuclear energy.

He is interested in the study of international auxiliary languages.