Charles Babbage is generally considered______-the first computer.A.to inventB.in
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Charles Babbage is generally considered______-the first computer.A.to invent | B.inventing | C.to have invented | D.having invented |
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答案
C |
解析
非谓动词表示的动作如果发生在句子谓语动词表示的动作之前,非谓语动词就要用完成体。 |
举一反三
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