Robots similar to real people were shown in America. I think there ___ fewer workers in factories in...
2022-12-01 22:15:21 38次 2016届河北保定清苑区九年级中考模拟考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Robots similar to real people were shown in America. I think there ___ fewer workers in factories in a few years.
A. were B.are C. will be D. have been
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