All teachers want to be in a ( )class where students are happy to ask and answer questions .

题目

All teachers want to be in a ( )class where students are happy to ask and answer questions .
A.active.B.lively
为什么选B不选A,请详解,

答案

很简单的理由选A前面用an,不是a,呵呵,因为active是元音读音开头的,所以只有选B,其实意思差不多,“活泼的,积极的”