单项选择题X 纠错
A.They could employ large numbers of slaves in cotton plantations.
B.They could only produce cotton.
C.The black people could go to the north to make money.
D.They could unite the southern states.
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单项选择题
A.northerners thought they didn't make large profits from cotton
B.northerners thought slavery was the cause of the backwardness in the south
C.southerners thought the north made the south poor
D.the north and the south had different interests
单项选择题
A.did not need to do
B.needn't have done
C.must not have done
D.couldn't have done
单项选择题
A.coordinate
B.subsidiary
C.auxiliary
D.subordinate
单项选择题
A.are going to discuss
B.will be discussing
C.are discussing
D.are to discuss
单项选择题
A.implement
B.complement
C.compliment
D.supplement