Bank was the first crops from one continent to another, helping to develop local economies

Bank was the first crops from one continent to another , helping to develop local economies with these new imports.
A. move; on a large scale
B. moving; on large scale
C. to move; on a large scale
D. moved; on a large scale

A. move; on a large scaleB. moving; on large scale (答案→)C. to move; on a large scaleD. moved; on a large scale解析：序数词以及有序数词修饰的名词或代词加动词不定式作后置定语；on a large scale 固定短语，“大规模的”。

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