Edison tested more than one thousand materials to see if they could_____electric current and glow.

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问题 Edison tested more than one thousand materials to see if they could_____electric current and glow.

选项 A、bring
B、make
C、carry
D、produce

答案C

解析 A项“带来”,具有方向性;B项“制造”;C项“传送,传播”;D项“产生”。C项为正确答案。
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