阅读短文，然后从方框中选出可以填入文中空白处的单词。
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What's the most popular school activity among American students? The 1_______ is the school dance.
Most American high schools have at least two dances 2_______ the year, one in winter and the other in spring.
Students attend these events 3_______ it's a great opportunity for them to meet _______ friends.
At the dance, there will be snacks and photo booths (机器拍照亭), as well as strict (严格的) rules to
4_______ create a healthy and enjoyable evening for all students. And all the dancers will be given a security
check (安检) before they come into the dance 5_______. This is acceptable. But some rules may be a little bit
over the top (过分). For example, a school once asked 7_______ students to keep a standing position while
they were dancing. That 8_______ the students couldn't do anything freely. You'd 9_______ not break the rules
because you'll be asked to leave there, or even worse, be placed on a do not invite list.