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题型：单选题 题类：常考题 难易度：普通
仁爱科普版九年级上Unit 4 Amazing ScienceTopic 1 When was it invented?同步练习
B: Yes, it more than l00 years ago.
—Our computers by a virus, so the engineer disabled(禁用)all of them.
—Yes, everyone ___________about it.
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