Bill is good at playing football,but when comes to basketball,he knows nothing.
—— I didn’t see her yesterday. —— Oh, but you _______________.
They must have been here the day before yesterday,____?
She________the film. She knows nothing about it.
—— Nacy_________ the letter from her mother. —— No, she can’t have. The postman hasn’t come yet.
I don’t think he_______ a new bike.