题目内容
Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.
A. improved upon B. take down C. put up D. break away
C
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题目内容
Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.
A. improved upon B. take down C. put up D. break away
C