I once worked in the English Department in the university but I got laid off because I _____ the courses     required for further education. Meanwhile my colleagues were still there, ______ easy money.    [ ]

A. hadn’t taken; making    

B. didn’t take; making  

C. hadn’t taken; made  

D. didn’t take; made

性能验收试验完毕后，每套合同设备都达到合同规定的各项性能保证指标后，采购方与供货方签订( )。

A．合同设备改进合同书

B．合同设备安装条款

C．合同设备质量保证书

D．合同设备初步验收证书