企源知识库

It is quite necessary for a teacher to have good manners and__________ knowledge.
A、extensive
B、expensive
C、intensive
D、expressive
【正确答案】：A
【题目解析】：extensive广泛的；expensive昂贵的；intensive强烈的；expressive有表现力的句意：作为一名教师，有良好的礼貌和广博的知识是非常必要的。