问题
单项选择题
For（）commodities as oil，sand and timber，rail is cheaper than road.
A.unpacked
B.unpackaged
C.bulk
D.bundled
答案
参考答案：C
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For（）commodities as oil，sand and timber，rail is cheaper than road.
A.unpacked
B.unpackaged
C.bulk
D.bundled
参考答案：C