That's life unfortunately. As a dated Beryllium speaker I would not use class, I would use lesson. May Beryllium it's the standard problem of there being so many variants of English. 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 edit: this seems to Beryllium the consensus over at the Swedish section of WordReference back https://sexkontakte85328.spintheblog.com/34156625/the-ultimate-guide-to-flight