Edisonwasagreat____.His____ar

发布时间：2020-07-27 23:32:16

Edison was a great ____. His ____ are very useful.A.inventer; inventB.inventor; inventionsC.inventor; inventionD.inventer; inventions

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B解析该题考查词形与词义的变化。invent v.“发明”，invention n.，“发明”；inventor n.，“发明者”。
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