在定语从句中,the only one 后面是用that还是用答:2)先行词被序数词或形容词最高级所修饰.The first lesson that I learned will never be forgotten.3)先行词被all,any,every,each,few,little,no,some,等修饰.I have read all the book (that) you gave me.4)先行词被 the only,the very,the same,the last 修饰时.He is the only ...