By the time she_____体操比赛上 at the New York Good Will Games, she_________ a dedicated junior gymnast for eleven years.
— Whose notebook is this? — It could be ______.She studies French.
Your ability has never been in doubt-- the question is ____ you are prepared to work hard.
At last we came to a mountain, at the top of which ______,
---Must I take this medicine, Mom? It ________ so terrible. ---Yes, you must take it for another three days.
The audience are _______young people who like pop music at the concert.