this is the one i wanted.这句考察的什么,为什么,及关联的知识点是什么

this is the one i wanted.这句考察的什么,为什么,及关联的知识点是什么 This is the one I wanted .和This is the one what I wanted.有什么 This is the one I wanted. This is the one that I wanted. This is the one I wanted . This is (the one/what) I wanted.为什么不能用which This is the one ______I wanted. 2.This is ___ I wanted .A.the one what B.which C.one which D 4This is ______ I wanted.A.the one what B.which C.one which 考察的知识点是什么呢  不同知识点的考察 This tree truck is thicker than that one.这句话的同一句是什么?