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题目
题型:不详难度:来源:
Charles Babbage is generally considered ______ the first computer.
A.to invent  B.inventing
C.to have inventedD.having invented

答案
C
解析
不定式的动作发生在谓语动词之前,不定式要用完成时态。
核心考点
试题【 Charles Babbage is generally considered ______ the first computer.A.to invent  】;主要考察你对现在分词等知识点的理解。[详细]
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