听力音频：
Write ONE WORD AND/OR A NUMBER for each answer.
The African clawed frog (Xenopus laevis)
Description
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Skin is 31. ………………………………… and can vary in colour
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Skin is coated with a slippery film for 32. …………………………………
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Males are 33. ………………………………… the size of females
Habitat
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Native to Africa
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Live in fresh water – prefer water that is 34. …………………………………
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Can survive high levels of 35. ………………………………… in water
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Cannot survive if there is any metal in the water
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In drought conditions, may live in 36. ………………………………… for up to a year
Diet
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Eat living or dead water creatures
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Find food using their sense of 37. ………………………………… their fingers, and their lateral lines
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Take food into their mouths using front legs and a 38. ………………………………… system
Other information
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Now popular as a pet in the US
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In some US states they are identified as a 39. …………………………………
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Used in laboratories for developmental research
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Mucus from the skin has 40. ………………………………… properties
答案
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