—Hi, Jack. Did you go to Jim's birthday party?

—No, I felt so sad. I _____.[ ]

A. didn't invite

B. wasn't invited

C. am not invited

D. hadn't invited

COCOMO模型是（）。

A．模块性成本模型

B．质量控制模型

C．结构性成本模型

D．进度管理模型