吴京甄子丹天涯:1.Charles Babbage is generally considered ___ the first computer.
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1.Charles Babbage is generally considered ___ the first computer.
a.to have invented b.inventing c.to invent d.having invented
怎么分析这道题的?
a.to have invented b.inventing c.to invent d.having invented
怎么分析这道题的?
a. to have invented
首先是不定式,其次在不定式中要表示过去发生的动作则用完成时态,如果仅用to do,通常则表示尚未或将要发生的动作。
选A
发明电脑是已定事实,要用完成时
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