-- I called you last night , but you didn’t answer.-- Sorry, Grace. I________I am A Singer when the phone rang.A. am watchingB. was watchingC. have watched
All my classmates are Tibetans ____ me.
Cheongsam is one of ____ dresses in China. And many foreigners also like it very much.
The Great Wall is known ____ the world.
The children were so excited that they could ____ speak.
The policeman asked the child ____ so that he could take him home.