Is this your bicycle, David? —No, it’s not . It’s Helen’s.

Do you know Peng Liyuan?—Of course, she is First Lady of China, famous singer.

Oh, Mary! I ________ you.— No surprising. The first time you met me, I was only a little girl.

Do you know the girl ____ red?-Oh, she is my sister.[ ]

Excuse me, could you tell me __________?—In ten minutes.