4.The test paper having been written, the teacher gave us the home task for the next lesson.
5.The test paper being written, the teacher didn’t answer any of the students’ questions.
8.The food having been chosen, they paid for it and left the supermarket.
9.All the questions asked, the meeting was closed.
10.The problem discussed, the friends went home.
11.The letter having been delivered, we learned the news.
12.The tracking number being received, he could track the letter.
13.The exams taken, Nick went on a holiday abroad.
14.All the preparations having been made, they were waiting for the guests to arrive.
15.The dinner finished, they decided to go for a walk.
16.The door being locked, I had to wait you for an hour.