lighets were____ by thomas edison many years ago 1.produced 2.invented 3.found4.discovered

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lighetswere____bythomasedisonmanyyearsago1.produced2.invented3.found4.discoveredlighetswere____bytho

lighets were____ by thomas edison many years ago 1.produced 2.invented 3.found4.discovered
lighets were____ by thomas edison many years ago 1.produced 2.invented 3.found
4.discovered

lighets were____ by thomas edison many years ago 1.produced 2.invented 3.found4.discovered
选2 发明的意思,是被动

电灯是爱迪生在多年前发明的