________ is said that the zipper was invented by Whitcomb Judson. A. That B. It C. This D. Which
2022-10-08 21:11:38 80次 2018年秋九年级（人教版）英语单元练习卷：Unit 6 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
________ is said that the zipper was invented by Whitcomb Judson.
A. That B. It C. This D. Which
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