题目：
选择题
We have ＿＿＿＿ that marble is ＿＿＿＿ in your country in the manufacturing of art objects.
- A. been informed … being imported and used
- B. been informing … imported and used
- C. informed … being imported and used
- D. been informed … importing and using
答案：
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