--- ____ busy schoolwork, the children also have to take arts, music and sports classes in their free time.--- I wonder what they will become.
Sam enjoys ___ stamps.
___ many children like sugar, I think they had better try not to eat it too often.
—What are you doing? —I’m ___ my cat. I can’t find it.
____ I know, many thousands of kids have read the books written by Han Han.
—Have you ever seen ___ book on the desk? —Is it ___ English book? I saw it just now.