性格的结构：性格的态度特征、性格的意志特征、性格的情绪特征、性格的理智特征
参考答案：对
They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.
A．had been working; are still working
B．had worked; were still working
C．have been working; have worked
D．have worked; are still working
何为间接铆接法（反铆接），有何要求？
