Little children should go to school to learn something. they should learn how to behave w

问题补充：

Little children should go to school to learn something. ，they should learn how to behave well in social life.

A. After all

B. In all

C. At all

D. Above all

答案：

A. After all

B. In all

C. At all

(答案→)D. Above all

解析：考查介词短语辨析。A终究，毕竟；B总共，共计；C根本，全然；D首先，最重要的是；句意：小孩子应该上学学习知识，最重要的是他们应该学会在生活中行为良好。个句意说明D正确。