Look! The bird __in the sky.A. is flying B. flies C. fly
The old lady did not know ___________when the house caught fire.
---I will go riding with my friends this weekend. ---Really? ________!
--- Is there ___________ to tell us? --- No, nothing.
I met an old friend of mine ______________ my grandparents’ home.
—Would you mind turning down the music? — _____________.