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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
The recent changes in the market have made investors sit up and take notice.
She is sitting up and taking notice of the speaker's words.
Past tense: The unexpected news made everyone sit up and take notice.
The loud crash made everyone in the room sit up and take notice.
They were sitting up and taking notice of the beautiful sunset when the phone rang.