题目内容
________ different kinds of pianos, the factory is sure they can satisfy people’s needs.
A. To produce B. Being produced C. Produced D. Having produced
D
解析:根据后半句说,“工厂确认足以满足人们的需要”,那么前提应该是“生产各种各样的钢琴”应该已经成为事实,所以用现在完成时,动词-ing形式作状语。
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