当国际商务谈判进入结束阶段时谈判已全部了结。( )
参考答案：错
--- I let my secretary call you several times. Do you know that?
---- I _______ in a meeting. I’m sorry.
A．had been
B．was
C．am
D．have been
宪法规范所调整的社会关系叫做（）
