2. 外语
  3. Cheap labor (scarcity was) in the cotton plantations (of the) American South, and (slaves) became (standard) practice.

Cheap labor (scarcity was) in the cotton plantations (of the) American South, and (slaves) became (standard) practice.

admin2008-10-11  137
问题 Cheap labor (scarcity was) in the cotton plantations (of the) American South, and (slaves) became (standard) practice.
选项 A、scarcity
B、of the
C、slaves
D、standard
答案B改为in the
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