MartinCooper,aUSresearcher,wasco

发布时间：2020-07-11 18:34:42

Martin Cooper , a US researcher , was considered ______ the first cell phone.













A.invented












B.to invent











C.having invented











D.to have invented

网友回答

D解析考查非谓语动词。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，
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