听力音频：
Questions 31-40
complete the notes below
Write ONE WORD ONLY for each answer.
Study on Puffins in Canada
Background
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In the 19th century, the birds were hunted for their 31. ______
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To save the population, some chicks were sent to the area
Recent cause of decline:
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______ on the sea and on the cliffs
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Puffins were encouraged to return by management of the 33. ______ around nesting sites
Findings
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Puffins like to dig holes in the ground for nests
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Greater 34. ______ of nests on the sloping ground
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Also, more 35. ______ among male puffins on sloping ground
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More 36. ______ in egg laying dates on the levelground
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Same egg 37. ______ in both habitats
Feeding
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Chicks are fed the same amount of meals by parents
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More 38. ______ feeding on the sloping ground
Threat from predators
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On level ground, adult puffins are in the danger of 39. ______ when feeding chicks
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As a result, the chicks are in a risky situation
Conclusion
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Slope is the ideal place for nesting
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Escape from predators depends on the 40. ______ of taking off
答案
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