1. I was sitting in the park when suddenly I heard a noise nearby. A few teenages were playing loud music. (sit hear, play)
2. The couple was singing a love song when we arrived at the party. (sing, arrive)
3. Alice was wearing a beautful white áo dài when l saw her at the performance. (wear, see)
4. I was making a birthday cake for my mom when my sister came home. (make, come)
5. We suddenly realized that we were driving in the wrong direction. (realize, drive)
6. I met an old friend in town while l was going shopping. (meet, go)