According to the announcement, what is the audience asked to do?

Câu hỏi :

Question 48 - 50 refer to following paragraph:

Good evening, ladies and gentlemen and welcome to the Sydney Opera Center. Because tonight’s performance will be taped, we ask that all guest refrain from taking photographs throughout the performance. We would also ask that all cell phones and pagers be turned off while the performance is in progress. Thank you for your cooperation and enjoy the show.
48. According to the announcement, what is the audience asked to do?