Christopher is my best friend.

Stanford University is a world-renowned university.

I am planning to go to Hannover, Germany next week.

In Japan, husband and wife retaining different surnames is not yet recognized.

My father likes to tell dad jokes.

This old house is covered with thatch.

The human immunodeficiency virus destroys the immune system, making the body unable to fight disease.

It is important to learn about the prevention and treatment of the human immunodeficiency virus.

Steam is rising from this pot.

The volcano erupted.