【简答题】invent/ discover (请选择正确的词,以正确的形式填空) a) It was in 1492 that Columbus America. b) The telephone, which by Bell in 1876, was a great improvement on the telegraph(电报). c) Gilbert electricity, but Edison t...
【简答题】invent / discover a) It was in 1492 that Columbus _________________ America. b) The telephone, which __________ by Bell in 1876, was a great improvement on the telegraph. c) Gilbert ____________ elec...