摘要： At last year’s High-Tech Expo, scientists the development of a new kind of washing machine. A. reminded B. declared C. raised D. announced [解析]选D.考查动词词义辨析.句意:在去年的高科技博览会上.科学家宣布了一种新型洗衣机的产生.remind提醒,declare指官方的正式的宣告,raise提出,announce发布.宣告.

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