Charles Babbage is generally considered to _______ the first computer.

A.to invent

B.inventing

C.to have invented

D.having invented

 

【答案】

C

【解析】考察不定式用法。Consider sb to do/be…認為某人…;發(fā)明了第一臺電腦是一個已經(jīng)完成的事情,所以使用完成式to have done.

 

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