他们发给我一张请柬，上面写着我可以在第一天免费带一个朋友去。
They sent me an invitation with a note saying I could take a friend for free on the first day.
他们寄给我一张请柬，上面写着第一天我可以免费带一个朋友去。
They sent me an invitation with a note, saying I could take a friend for free on the first day.
他们免费送给我们旧书。
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