38. Donkeys and camels are still widely used in some parts of the world _____ of burden.
| A．for animals | B．as animals | C．as beasts | D．instead of beats |
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38. Donkeys and camels are still widely used in some parts of the world _____ of burden.
| A．for animals | B．as animals | C．as beasts | D．instead of beats |
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