缺词填空。 The room goes dark. The audience becomes quiet. The music begins. The movie starts. In the US, it is g 1 to see parents watching cartoons with their children, or a group of male friends watching an action film together. People often eat popcorn in the c 2 . They drink soda. Theaters also sell candy and chocolate. S 3 people bring their own food in to save m 4 . But how do you know which films you can w 5 ?The US has a rating(分级) system.If a movie is rated G, it means General Audience, and a 6 can see it. PG means Parental Guidance(家长指导). That means you need your p 7 to go with you, if you’re really young. A PG-13 movie means you h 8 to watch it with your parents if you’re y 9 than 13 years old. And a 10 R rated movie means unless you’re o 11 than 17, you need your parents to be w 12 you.