对呀。有the only 修饰时，只能用that 引导定从。例如：she is the only girl that i ever loved.但是同学请你留意，上面那个句子中的定从和主句之间是没有逗号的哦。如果有，万万不可使用that; 如果在定从前出现了介词，也万万不可使用that。例如：English is the only subject, which i find the easiest among all subjects.This is the only book in which i intereted most.希望帮助了你的学习哦^-^...
