
31. What's this? 这是什么?
32. That's a book. 那是一本书。
33. Is this your book? 这是你的书吗?
34. No,that's not my book. 不,那不是我的书。
35. Whose book is this? 这是谁的书?
36. That's your book. 那是你的书。
37. And what's that? 还有那是什么?
38. Is that a book? 那是一本书吗?
39. No,it isn't. 不,不是。
40. It's a pencil. 那是一枝铅笔。