21. Are they reading
22. Are you learning
23. Is Karina writing
24. Is Sara playing
25. aren't playing
26. is walking
27. are waiting
28. isn't moving
29. are you coming
30. am sitting
31. isn't having
32. are playing
33. is sitting
34. am not ('m not) wearing
35. isn't standing
36. am not ('m not) writing
37. is having
38. is leaving
39. is making
40. is opening
41. is brushing
42. is singing
43. is listening
44. is walking
45. is writing
46. are the boys doing
47. is eating
48. is your teacher saying
49. is playing
50. are Eva and Marcin sitting
51. am learning
52. am eating
53. am watching
