I’m going to see a movie with my friends this weekend. We love seeing movies, but we all like different kinds. I like to see thrillers （恐怖片）and science fictions（科幻片）, my friend Sam loves action movies and comedies（喜剧片）and my best friend, Lee, loves a good romance. Because we like different kinds of movies, it can be difficult to choose one to see.So we usually take turns to choose the movie. It’s my turn to choose this weekend, so we’re going to see Harry Potter Ⅱ, a new movie. It’s number one at the box office, and everyone is saying what a great movie it is. I can’t wait!
How many kinds of movies does the writer talk about in the story?