✔ 最佳答案
如果現在購買...可得到買2送1嘅優惠...
You'll get a bonus set if you purchase it right now.
or
Buy one get one free, for instant purchase only.
2008-11-19 14:56:37 補充:
Sorry, 誤解題目, 應是:
You'll get an extra piece if you purchase two pieces right now.
Buy two get extra one free, for instant purchase only.
Thank you.