问题
单项选择题
The profit from the camage of cargo,which is often called（）,keeps the mer-chant ship running.
A.obligation
B.freight
C.contract
D.delivery
答案
参考答案：B
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The profit from the camage of cargo,which is often called（）,keeps the mer-chant ship running.
A.obligation
B.freight
C.contract
D.delivery
参考答案：B