Kei's birthday party was filled with everyone's jubilation.

He taught me Japanese.

This room is very cramped.

This road is very narrow.

He was behaving as if he was crazy.

He and I compete in tennis every week.

I was amazed at his new idea.

Acoustic phonetics is the study of the physical properties of speech.

The Federal Republic of Yugoslavia was once an existing nation.

Zoonosis refers to diseases that can be transmitted from animals to humans, or vice versa.