過去式：unfastened 過去分詞：unfastened 現在分詞：unfastening
.... At the beginning , I thought they were unfasten so I was really nervouse. As I walked by they...
...listen finish follow book add present English CD, it lets me unfasten beauty style English and english-type English accent's difference, text...
...keep them fasted whenever seated. Just pull the buckle to unfasten them. Please refer to the emergency instruction card in seat pocket for...