----We're going for a picnic next Sunday, and I'd like you to join us.

---_______！I have to see my grandmother. She has been ill for two weeks.

A．What a pity

B．Good luck

C．That’s all right

D．Go ahead

沟通是一个复杂的过程，其中不属于沟通过程步骤之一的是（）

A.编码

B.译码

C.传递信息

D.解码

E.反馈