回答
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Please get up and talk with two different people, then return to your seats.
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Once you've talked with two people, please return to your seat.
Please get up and talk with two different people, then return to your seats. =
立ち上がって2人の人と話し、その後席に戻ってください。
Once you've talked with two people, please return to your seat.
二人の人と話をしたら席に戻りましょう。
ご参考になれば幸いです。