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题型:单选题 题类:常考题 难易度:普通

鲁教版(五四制)初中英语九年级Unit 1 When was it invented单元整合

Nowadays China       for its new "four great inventions"—shared bicycles, electronic payment, high-speed railways and online shopping.
A、was knowing B、was known C、is knowing D、is known
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