On most American farms,one or two products have been raised
On most American farms,one or two products have been raised for a cash crop .
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laililan545 幼苗
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B.two principle products就近选复数areC.When they visit our country句子做主语，谓语动词用单数，所以是hasA.every修饰，是单数概念，所以谓语动词是单数的，后面有now，所以是现在时，用is
1年前
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你能帮帮他们吗