11、It is quite necessary for a qualified teacher to have good manners and______ knowledge.

题目

11、It is quite necessary for a qualified teacher to have good manners and______ knowledge.
A、extensive B、expansive C、intensive D、expensive
请告诉我正确选项以及其它答案为什么错,

答案

选A广博的,广博的知识
D是贵的,C是加强的,B是广阔的