20 students want to attend the class that aims to teach how

20students为主语,want to attend为谓语,the class 宾语,that后面引导的是定语从句,that aims to teach how to read fast。从句中：that 为主语,aims to teach为谓语,how to read fast为宾语从句翻译：20个学生想要参加这个旨在教快速阅读的班。