China, ____ one of the great four countries with ancient civilizations, is best-known _______ its great development in all the fields over the years.
— Is Lily good at singing? —Yes , she is.We often hear her_______ in the next room.
— Will you go to Sandy’s birthday party? — I won’t go unless Tony______.
—_____will you stay here? —Until tomorrow afternoon.
My shoes are worn out.They need_______.
_______ Andy was playing,his mother came home.