以下两道高中英语选择题答案,求大神解释,谢谢He is considered to be a gifted manager,___with a quick mind and good humorA.one B.each C.that D.who(答案为A,为什么不可以用who做定语从句)How do you like the book ?--It's quite different from __I read last monthA.that B.the one what C.the one D. which(答案为C,我选D,C省略了that 吧,也可以,为什么不能是D?)