did people arrive at seven o'clock?答语
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didpeoplearriveatseveno''clock?答语didpeoplearriveatseveno''clock?答语didpeoplearriveatseveno''clock?答语Yes,
did people arrive at seven o'clock?答语
did people arrive at seven o'clock?答语
did people arrive at seven o'clock?答语
Yes, they did./No ,they didn't
Yes, they did.
Yes,they did.或
No,they didn't.