1. Why are you laughing?
2. Are you using this dictionary?
3. Radio is not (isn’t) working.
4. The doctor is conducting an operation now.
5. Why are you always interrupting people?
6. He is always shouting at me.
7. We are landing in Heathrow in 20 minutes.
8. Nowadays we are starting to use more electronic books.
9. Look! They are fighting.
10. Hurry up! They are waiting for us.
11. Just imagine it! They aren’t Listening to me.
12. Where is he waiting for us?
13. He is finishing this project next week.
14. Why is he looking at us so curiously?
15. I am not writing now.
16. You are reading .
17. Where are they cooking?.
18. Is she crying?
19. Mary is not listening to him.
20. Whom are you waiting for?.