问题
选择题
Charles Babbage is generally considered ________ the first computer.
A．to invent
B．inventing
C．to have invented
D．having invented
答案
答案：C
被动语态后用不定式连接，根据句意用完成式。
搜题请搜索小程序“爱下问搜题”
Charles Babbage is generally considered ________ the first computer.
A．to invent
B．inventing
C．to have invented
D．having invented
答案：C
被动语态后用不定式连接，根据句意用完成式。