Charles Babbage is generally considered ______ the first computer.

　 A. to invent 　       B. inventing

　 C. to have invented 　 D. having invented

C


解析:

不定式的動(dòng)作發(fā)生在謂語動(dòng)詞之前，不定式要用完成時(shí)態(tài)。

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(   ) 7. A. lower                 B. higher              C. more                D. less

(   ) 8. A. amount              B. number            C. quantity            D. deal

(   ) 9. A. much                 B. many                      C. few                  D. little

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