---You look so tired. What happened? ---I____late writing an article for a newspaper yesterday vening;.

—Who is playing the piano in the classroom? —_______ must be Susan. She plays the piano after school every day.  

Jim, _______do you know about table manners all over the world?

All of us have gone out. There is ________ at home.

---Have you finished your homework _______ ?    ------- Not ______.