Jane was disappointed that most of the guests    

when she       at the party.

A．left; had arrived

B．left; arrived

C．had left; had arrived

D．had left; arrived

以马克思主义为基础最早探讨教育学问题的著作是( )

A．加里宁的《论 * * 主义教育》
B．马卡连科的《教育诗》
C．克鲁普斯卡娅的《国民教育与民主制度》
D．杨贤江的《新教育大纲》