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to sit up and take notice
01
to suddenly become attentive or alert, often due to something surprising or remarkable
例
Past tense: The unexpected news made everyone sit up and take notice.
They were sitting up and taking notice of the beautiful sunset when the phone rang.
When the professor mentioned the upcoming exam, the students immediately sat up and took notice.
She is sitting up and taking notice of the speaker's words.
The recent changes in the market have made investors sit up and take notice.
