In the library’s warehouse, robots would manage stock and fetch books ______. A.on board B.on watch ...
2022-05-17 20:16:14 165次 2020届江苏省南通市高三适应性练习英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
In the library’s warehouse, robots would manage stock and fetch books ______.
A.on board B.on watch C.on demand D.on occasion
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