听力音频：

31. Emu’s ______ can be used for luxurious use, such as making expensive items.
32. Emu lives in most areas of Australia, apart from the ______
33. Oil is one material that used to produce ______ in ceremony.
34. Feathers can be made for decoration for the hats of Australian ______
35. Emus produce sound like ______
36. ______ are research subjects used by scientists for their field work.
37. Their ______ have soft pads, with only three toes, so they can run at very fast speed
38. There are some ______ difficulties in exporting them to new markets like India, China etc.
39. For past one hundred years, ______ is allowed.
40. Emu oil has medical applications in treatment of ______ problems.

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