There are six boys and two girls in the classroom; that’s eight .
A. at all
B. in all
C. after all
D. above all
网友回答
A. at all
(答案→)B. in all
C. after all
D. above all
解析：考查介词短语辨析。At all根本，全然（与否定词连用）；in all共计；after all终究；毕竟；D首先，最重要的；句意：在教室里有6个女孩和2个男孩，共计有8个学生。根据句意说明B正确。