is sleeping

2sets

3 goes

4doesnt rain

5 are having

6 drinks

7returns

8is writing

9 is coming

10 moves 

11 smells

12 taught

13falls/gets

14 has sit

15 was

16 took

17 hasn't spoke

18 has tried  / don't succeed

19 had seen

20 does

1. Be quiet ! The baby (sleep) …is sleeping……………………
2. The sun (set)……sets……………. in the west.
3.Mr Green always (go)…goes………. to work by bus.
4. It ( not rain )……doesn't rain…………… in the dry season.
5. They (have) ……are having………………..lunch in the cafeteria now.
6. My little sister (drink)…drinks…………. milk every day.
7. The doctor sometimes (return) ……returns……………. home late.
8. He (write) …is writting………………..a long novel at present.
9. Look ! The bus (come)…is coming…………………
10. The earth (move)…moves…………….. around the sun.
11. Sometimes it (smell)…is smelling……………….. good in the kitchen now.
12. His uncle (teach)……taught……….. English in our school five years ago.
13. The old man (fall)…………. as he (get)……………… into the bus.
14. When I saw him, he (sit)…sat…………. asleep in a chair.
15. There (be)…were………….. a lot of noise at the fair yesterday.
16. It (take)…took………. me 5 minutes to walk to school last year.
17. They (not speak)…haven't speak……………….. to each other since they quarreled
18. I (try)...have been trying.... to learn English for years, but I (not succeed).....have not succeeded... yet
19. I (not see)……haven't seen…………… her since last week.
20. John (do)……has done……… his homework already.