A.Listen to your mother carefully.

B.Listen to our teacher carefully.

C.Listen careful.

【答案】B

【解析】

A选项“认真听你妈妈讲话。” B选项“认真听我们老师讲话；C选项“认真听”表述有误，应该是 Listen carefully；故C选项错误；根据题目要求可知A选项不符合题意，故选B。