13. I have finished ______ (do) my homework.

12. He enjoys ______ (play) football. What about you?　

11. The sun ______ (rise) in the east.

10. We _______ (wait) for her for some time, but she didn’t come.

9. Look! The girl is ______ (write) something on the wall.

8. Don’t _______ (worry) about it. It’s nothing serious.

7. He ______ (open) the door and found a letter on the floor.

6. Things are _______ (change) very quickly.

5. All of us have ________ (see) the new film.

4. He was _______ (watch) TV when we arrived.