A With production B having gone up steadily, the factory needs an C ever-increasing supply D of raw materials.

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问题 A With production B having gone up steadily, the factory needs an C ever-increasing supply D of raw materials.

选项 A、 
B、 
C、 
D、 

答案B

解析 应改为going,根据句中steadily及谓语needs可知B项不应用完成式。
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