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Charles Babbage is generally considered ______ the first computer.

A．to invent          B．inventing          C．to have invented    D．having invented

Charles Babbage is generally considered ______ the first computer.

A．to invent          B．inventing          C．to have invented    D．having invented

Charles Babbage is generally considered ________ the first computer.

A．having invented                                          B．inventing

C．to invent                                                    D．to have invented

Charles Babbage is generally considered ________ the first computer.

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