31. What’s this?

32. That’s a book.

33. Is this your book?

34. No, that’s not my book.

35. Whose book is this?

36. That’s your book.

37. And what’s that?

38. Is that a book?

39. No, it isn’t.

40. It’s a pencil.

41 .Is it yours?

42. Yes, it’s mine.

43. Where’s the door.

44. There it is.

45. Is this book his?