Most people, when they talk about education, think that it is only a task for teachers, ________ we teachers consider it is a job of the whole society.

A.whenever

B.while

C.thus

D.otherwise

答案及解析： B

解析：

这是一个由while连接的并列句，强调前后两种观点的对比，A、C、D均不符合题意．