下列所有都是有效的变更控制系统的部分除了（）
A.流程
B.报告标准
C.会议
D.经验总结
参考答案：D
Go to the kitchen. _______________[ ]
A. Have a sleep.
B. Have a snack.
C. Take a shower.
--The mistake_____, I had been more careful.
---But you weren’t at that time.
A．might have avoided
B．would avoid
C．would be avoided
D．might have been avoided
