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【题目】To ______________something is to produce or design it that has not existed before.
A.invent
B.discover
C.Find

【答案】A
【解析】句意:发明一种东西是生产或设计以前不存在东西。A.Invent发明;B. discover 发现 ; C. Find发现。根据题意可知,是发明invent故选A。

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