Simone
如果the only one 要求从句谓语用单数形式,only one要培宴用复数形式.举例：野中禅He is the only one of the students who is never late .他是学生中 唯一不迟到的学生因为从不迟到的学生（who is never late）是唯一的（the only one）,is代表了唯一的学生,所以用单数He is only one of the students who are never late .他仅仅是从不迟到的学生中的 一个.who are never late修饰颂尘students,学生多个,所以用are
