摘要：348] Charles Babbage is generally considered the first computer. [译文] 一般都认为是Charles Babbage发明的第一台电脑. A. to invent B. inventing C. to have invented D. having invented [答案及简析] C. 不定式的动作发生在谓语动词之前.不定式要用完成时态.

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