1. The lights had gone down and it was difficult to find the seats in the theatre hall.
2.
We were showing our tickets to the usher when the second bell rang. The perfomance was to start in three minutes.
3. When the curtain goes up, you can see the scenery on the stage.
4.
They were discussing the perfomance when they saw the
actress who had played the leading role in the perfomance.
5. The afternoon perfomance at the theatre usually starts at one o'clock.