Question

Martin Cooper , a US researcher , was considered _______ the first cell phone . A．invented ..

Martin Cooper , a US researcher , was considered _______ the first cell phone . A．invented B．to invent C．having invented D．to have invented

Answer 1

D

考查非谓语动词。sb be considered to have done sth认为某人过去做过某事。句意：Martin Cooper，美国研究者，被认为第一个发明手机，