问题
单项选择题
Donkeys and camels are still widely used in some parts of the world as beasts of______.
A．cargo
B．freight
C．burden
D．lading
答案
参考答案：C
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Donkeys and camels are still widely used in some parts of the world as beasts of______.
A．cargo
B．freight
C．burden
D．lading
参考答案：C