jack is the only one of the students who was praised at the last meeting 关系代词询问不是说one of后面用that 为什么用who 引导

He is the only one The only one is my jack is the only one of the few students who___ english wellA.seaks B.speak C.say D.tell 选哪个,为什么? The truth is only one 是什么意思 [ ]is the cat?-----It's only one. the only one for me is 英语阅读短文回答问题阅读：How old are they?Jack,Dick,Ann and Kate are brothers and sisters.I don't know how old each of them is.I only know,one is 18,and one is 15.One of the boys is 16,and one of the girls is 17.I also know,Jack is olde 阅读短文短文Jack,Dick,Ann and Kate are brothers and sisters.Idon't know how old each of them is .I only know,one is 18,and one is 15.One of ehe boys is 16 and one of the girls is 17.I also know Jack is older than Ann,but Kate isn't.1.How old is I have two f_friends .One is Jack a-the other Jack Chen is one of the best ( ) in Chine jack reads well ,but he things reading is only something one has to do at shool jack is the only one of the students who was praised at the last meeting 关系代词询问不是说one of后面用that 为什么用who 引导 is only one of 和is the only one of有没有区别? Really want is usually only one ,the murderer is you The boy is my only one,he name is there is only one student in the classroom .对onethere is only one student in the classroom .对one提问 10.This is the only one of the books published only one is perfect