听力音频：
Questions 31-40
Complete the notes below.
Write ONE WORD ONLY for each answer.
The Business of Recycling Tires
The typical tire dealer may generate 600 to 800 waste tires per 31. …………
There are companies recycling rubber for 32. …………
These recycling companies have no limit on the 33. ………… of a tire
A small percentage of the cash revenue has been invested into scientific 34. …………
The Recycling Process
Get rid of 35. …………
Wheel hubs are reused as steel 36. …………
Rubber can be combined with 37. ………… or making other types of products
Rubber-molded products include carpet padding or 38. ………… materials
Rubber may generate 39. ………… after being burnt
MSDS: the 40. ………… applied to the tread of a tire can be unsafe
答案
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