关于fairly/very/quite
1Hedidn`tbehavefairlypolitelyatthedinnertable.
Hedidn`tbehaveverypolitelyatthedinnertable.
2Mygrandmothernevergoestobedquiteearly.
Mygrandmothernevergoestobedveryearly.
这两道改错题,上面一句是题目,下面一句是答案.请问为什么要做这样的改变?