They _______ on the program for almost one week before I joined them, and now we ________ 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

《人民币银行结算账户管理办法》所称的单位银行结算账户是指（）。

A.单位人民币活期存款账户

B.单位定期存款账户

C.单位本外币存款账户

D.单位外币活期存款账户