CPPC表示( )。

A．成本加成本百分比酬金合同
B．成本加固定酬金合同
C．成本加浮动酬金合同
D．计量估价合同

－Have you ever been to Shanghai? 

－Yes. I ______ there with my father last year.

A．went

B．have been

C．have gone

D．had gone