Tom likes playing ________ volleyball, but Lily likes playing ________ piano.

How often ___________ the Olympics _____________? —Every four years.

Hearing the news about the crash of Air France Flight 447, he became very concerned _______ his daughter on board.

He speaks English _____ an American, so we all think he stays in America for many years.[ ]

Do you know ________ girl in pink on the playground? — Oh, yes, she is ________ honest student. She is my best friend.