Electiveness
选修制
🗣️ 情景例句
Well, make yourselves comfortable.
噢， 请大家自便。
Do you get much rain in summer?
这里夏天雨水多吗？
Sure. Don't be late -oh, and put on your old clothes.
当然。不要迟到--噢，还有，穿上你的旧衣服。