---    you disturb her with these annoying questions just when she was busy cooking dinner?

---Sorry, I      that at that time.

A．Should, should have done

B．Shall; may have done

C．Must, should do

D．Must, should not have done

观察设计和准备不包括的内容是( )。

A．问题、目的与对象的确定

B．理论准备、内容、项目与表格设计

C．试探性观察与观察取样

D．筹备观察资金