某建设项目发售招标文件时收取工本费500元，则在招投标结束后( )。

A．招标文件及收费都不退回

B．退回招标文件，收费不退回

C．不退回招标文件，收费退回

D．招标文件及收费分别退回

222. The gentleman made an apology for the mistake he had       , for he had taken my suitcase _____ mistake the day before.

A．had; for

B．made; for

C．had; by

D．made; by