题目内容
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[单选题]
The decline in gross profit was （) the dropping prices of chemical products.
A.due to
B.because
C.for
D.as
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.due to
B.because
C.for
D.as
如果结果不匹配，请 联系老师 获取答案
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